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  2. Grum
    Bit of a side issue, but reviewing your old post you had a No Spark situation. Now what got the bike going was to push start it! Have you confirmed again that when cranking you don't have a spark? This is not making sense unless the battery is bad, or some form of voltage drop on the EFI 12v Supply wire being the Black/White wire while cranking. If the voltage on this wire drops badly while cranking it could effectively disable the ECM = No Spark. If you had a spark issue, how could changing cam chains have any effect of having a spark or not? Did you ever get to replace the battery? And with engine running have you measured your charging voltage? Camshaft move at half the crankshaft. So 360deg of crankshaft movement will mean the camshaft has move 180deg. Which would mean your cam index marks would be pointing inwards instead of outwards. Someone else might confirm this!
  3. Kochan
    Hi Terry, I have an idea... What would happen if after removing the cam chains, the crankshaft would be rotated 360 degrees and then set as in the manual? Would it start? How would it behave? Any idea?
  4. Today
  5. Grum
    Hey Terry. Over to you, are you able to confirm his crank to cam alignments, I'm out of my comfort zone as Cams and Cranks don't have elektrikery going through them!
  6. Terry
    Grum might be onto something here. I know with the VTR1000F engine, it was possible to set the cams in the front and rear heads correctly with respect to the crank/marks, but out of time between the front and rear heads. This meant that instead of the rear cylinder firing 270 degrees after the front, the rear missed another 360 rotation and so fired at 630 degrees. In that engine it started and ran fine but was reluctant to rev. The manual has some very specific instructions about the sequence of cam reinstallation so that this is accounted for. I'm not saying this is the issue for you but it won't be hard to check.
  7. Kochan
    No, the crankshaft was in the correct positions 3T/4T during replacement and was not moved... The only thing that affects this position is chains. The old chains are slightly more loose, the new ones are bit more tight. On the old chains (the bike starting and working properly) On the new chains (the bike starts, but does not rev over 5k): WhatsApp Video 2024-04-19 at 08.56.56.mp4 When we move the cam shafts slightly forward, then the bike does not start but when push-started, revs over 5k... Loosing my mind here... 🙈
  8. Grum
    Have you possibly slightly upset the alignment between crankshaft and camshaft? Was the crankshaft 4T mark aligned with the index mark Before determining the Cams weren't positioned correctly? Did you disturb the crankshaft position while trying to fit new chains and aligning the Cam indexes? Might be worth rechecking this being sure that firstly the crankshaft 4T index is set correctly, or has this already been thoroughly checked? Attached is info from 5gen Service Manual, Technical Features section.
  9. WackenSS
    Do you run the vfrd headers with 2 bungs in the collectors? What protrusion? RapidBike right?
  10. Renan
    Thanks guys, I think I got enough information now.
  11. WackenSS
    Based on what I have seen from the leds on the controller and the fact that it is showing afr values after 30 sec I suspect you are right on this. Many aftermarket LSU controllers use their own algorithm and hardware. The BOSCH controller are Superior afaik. If i blow another set I will try a timer as well. I tried getting answers to the heat procedure but they gave me a pretty standard answer with no specifics.
  12. Kochan
    Hi @Grum, thank you for the quick answer. The valves adjustment was just done so they are all in spec. I'm not sure about the other things... Because the behaviour depends purely on the position of the cam shafts. If they're aligned correctly, by the book - the bike starts but does not rev over 5k - which indicates wrong timing. When the position is adjusted by one sprocket tooth forward, as on the old chains (when the bike was starting and operating fully) the bike does not start by itself but when push-started, it revs fully indicating the correct timing... Indicating the problem with start sequence Is it possible that the computer somehow "learns" the position of the cam shafts vs crankshaft?
  13. gropula
    What's the difference? This achieves your desired goal in a simple way. Your way can't work without an unknown amount of machining and/or mixing and matching parts. There's no place for a shim as it's usually a part of the VTEC bucket. The retainer sits very low. Experimenting with valve clearance trough lapping could achieve desired clearance but further adjustment as the valve recedes into the seat would be more complicated than the usual way of replacing the bucket with a thinner one, thus totally defeating the purpose of having a simpler adjustment procedure. If you want 4 valves all the time and easier clearance measurment follow the thread mohawk posted. Adjustment will be the same - replace the VTEC bucket. Yes it's more expensive than shimming but a 100$ for three buckets every 5 years is better than reinventing the valvetrain.
  14. gropula
    You don't have to buy the sensor from Rapidbike. It's an of the shelf part with Bosch part number 0 258 017 025, 5 wire sensor. It is used in some OEM applications, BMW I think. When I killed it I replaced it with a part number 0 281 004 157, 5 wire sensor from my Peugeot car which has the o2 sensor disabled in ECU so it didn't mind. Worked well before it died. I guess any 5 wire bosch 4.9 sensor with appropriate connector will work. The only difference I can see is the length of the wire and some heat shielding that may or may not be present on the sensor wiring. I killed the second one as well so I will wire in a timed relay which will wait for a set amount of time, say 5 minutes, before it gives 12V to the wideband. This way the exhaust will have time to heat up and any water condensation will evaporate before the sensor starts heating up. I found the timed relay on aliexpress for a few bucks and I'll install it under the seat. I'll buy another Bosch 4.9 wideband that has the same connector and 5 wires but a different part number. I think the rapid bike wideband controller has a bad heating strategy. It heats up too soon so when a droplet of condensation hits the sensor it dies.
  15. Presson
    Your idea has been discussed before. It doesn't seem like anyone has done the deep dive along the lines you propose. From the look of the parts diagram it appears you would need to change the VTEC valves for standard ones together with springs, collets etc. Lap in the new valves, experiment with valve clearances and possibly remap the ECU parameters. I doubt it would be straightforward.
  16. gropula
    Since ~14 is pretty lean for throttle response but good for cruising the accelerator pump function can add a set amount (say 10 points in the fuel trim table) whenever you open the throttle more. There's also a sensitivity setting so you can alter how quickly the throttle needs to be opened for the additional fuel to be added. It can also advance ignition timing in the same manner. There's no knock sensor so there is no mechanism to retard timing in case of knocking so it's probably not a good idea to use that function.
  17. jocod58130
    jocod58130 joined the community
  18. Grum
    Very interesting Mohawk. Noticed E10 Stoichiometric AF ratio is 14 to 14.1 whereas gasoline is 14.7 guess with your settings it was running a little lean and the E5 sorted it out. Assume it's all about the effect of Ethanol being a combustion oxygenate! Curious, what is the accelerator pump function? How does that effect a VFR? Cheers.
  19. Grum
    Love it! Never gave that a thought.
  20. Captain 80s
    There's one on each side.
  21. Terry
    I think Grum speaks the truth (as usual). I can find no mention of the BAS in the wiring diagram for the RC36.
  22. Grum
    Hi Greg. Sad to hear of the running pains and time and money spent with the Cam chain scenario. The only thing I can think of is that you haven't made any mention of valve clearances, are these all in spec? Any tight valves? Tight valves can cause hard starting problems. Other issues could be MAP or TPS, do you have any fault codes for these devices? Check vacuum hoses for the MAP sensor make sure these are all properly connected with no splits or cracks in the hoses. Do you have good fresh fuel? Perhaps a fuel filter/fuel flow situation, confirm this via the Service Manual pump flow test. Perhaps some of the Engine experts could chime in with some better advice! Good luck.
  23. Grum
    Bank Angle Sensor! Not aware the 750's had one!
  24. scb27
    scb27 joined the community
  25. racerreid
    Correction...down on the RIGHT side.
  26. olsonjim
    olsonjim joined the community
  27. racerreid
    Hi gang, Noob 94 owner. Had an 86 VFR with 86,000 miles on it when it was sold, so not first time vfr owner. I picked up a 94 that has been down on the left side. I bought it without front plastics cheap enough to do an f4i bodywork conversion to it, but I need to fire it up first. Where is the bank angle sensor located on the 94-97's and does anyone have a pic of it in the right spot?
  28. lesismore
    lesismore joined the community
  29. Yesterday
  30. djmccor81
    djmccor81 joined the community
  31. MikeSimon
    MikeSimon joined the community
  32. Kochan
    Hi guys, This thread is a continuation of the archived thread After months of a bike staying in a garage, and me collecting mental energy to deal with the issue once again, I decided to give it another try. After trying to test many different components and confirming the connections to all sensors and trying all suggested solutions by all the great members of the community I gave it to a friend, who is a professional mechanic. The first thing he tried was to push-start the bike and... it worked! The bike started and worked as normal but it can't start on its own. The next thing he checked was cam chains timing and here he found that the timing was a little bit off - the cam shafts were one sprocket tooth forward comparing to what's in the manual. So he adjusted the position of the cam shafts and... the bike started. But this time it won't rev over 6k. The new chains were DID chains so we suspected that maybe the DID chains do not fit perfectly, and decided to order original MORSE chains. The differences between DID and MORSE chains were: - the DID chains seemed very tight - the cam chain tensioner did not have too much room to unfold but the bike did not rev over 6k when cam shafts were aligned perfectly by the book - the MORSE chains seemed a little more loose (as expected) - the cam chain tensioner had a little more room to unfold but the bike did not rev over 5k when the cam shafts were aligned perfectly by the book So here is the situation. On the old cam chains, it's impossible to align the cam shafts marks perfectly with the cylinder head as it says in the manual. The position is slightly forward (clockwise) and then the bike operates normally. On the new cam chains, when the marks on the cam shafts are perfectly aligned with the cylinder head, the bike start's but won't rev over 5k - MORSE, 6k - DID. When the position is adjusted by one sprocket tooth forward, the bike won't start by itself but when push-started it operates normally. Both me and my mechanic friend are out of ideas and are going crazy over this issue... Do you guys have any ideas? @Grum my dear friend? 🙂 Thank you all in advance!!
  33. vfrgiving
    Why not just drop in a 5th Gen engine? That's been done before.
  34. bmart
    Same here. We're going out for a few days right after the rally. 80F every day and nice out.
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    1. HispanicSlammer

      A blog by HispanicSlammer in General

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      HispanicSlammer

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      Juniper Pass

      I took a day off from work and also from my bicycle training to take out the Veefalo one last time before the weather turns ugly, supposed to snow the rest of the week and possibly start sticking to the ground along the Colorado Front Range. I took a leisurely pace up hwy 105 toward Morrison and got reacquainted with the bike since its been over a month since I took any sort of twisties on it at all, hwy 105 is a scenic ride along the front range between Denver and Colorado Springs, its mostly easy fast sweepers and lite traffic so its a favorite road of mine when going north. Then I have to negotiate a bit of traffic near Highlands ranch and up hwy 470 into the mountains. I decided to take the Morrison Exit and try either Lookout Mountain or head up Golden Gate Canyon - this time it was Lookout Mountain, I was sort of making it up on the fly as I went along. Lookout Mountain is my old bicycling haunt from my days while I was working at Coors, its a killer ride and all uphill - I don't think I could do it today If I had to, not quite there yet! I saw a whole bunch of riders doing it though and wished I was in shape enough to be there doing it as well. 30 more lbs and I will be able to do it! On this day I would do it on the Veefalo instead.

       

       

       

       

      I took a video from the gateway to the top at the Lookout Mountain State Park, getting past riders, the guy in the green jacket actually pretty much astounded me with how far he had gotten in the short time it took me to set up my camera, some 3 miles at least and up to the gateway from the turn off at hwy 6! Amazing I thought. I took the first two turns slow then got more comfortable as I went up further, till I was doing well, I made some gearing mistakes and took the tight 15mph marked hairpins in the wrong gear so I lugged it a bit on one or two. Still enjoyed it though and then got off at the top and hiked over a rock outcropping for an overview of the road for the pictures below.

       

       

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      Lookout Mountain - Golden Colorado

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      Zoomed in

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      Lookout Mountain Park top of the mountain

      From there I headed up interstate 70 to Idaho Springs for a beer at the Tommy-knockers brewery, I was the only customer in the joint - slow day for them so they treated me like a king! I got a nice tour of the place sort of impromptu, they made me a nice Pastrami sandwich on rye and with the brown ale it was fantastic. I must say the beer is much better there than in the bottles - its always good at the brewery. I am glad I stopped

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      Tommy-knockers Brewpub Idaho Springs

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      Idaho Springs Colorado

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      Mashtuns and fermenters

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      Rows of fermenters

      I finished my lunch and since the road to Mount Evans is right there I headed up Squaw pass hoping to get in some nice pictures I wasn't expecting what I found, ICE IN ALL THE SHADY PARTS

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      Icy patches on Squaw Pass definitely taking it easy on that road

      There were some section where the ice covered the whole road for 300 yards or so I had to roll through it with my legs out to help keep the bike from sliding and falling over, I took it real slow. A Ford pickup was right behind me so I pulled over to let him pass but the guy was going slower then even I was so I pressed on - in places where I could see I just cut over to the oncoming lane and out of the ice where the sun was shining on the road more, but some places there was not alternative so I just had to go slow, good thing it wasn't slick but rather they tossed some gravel over the worst parts so I had some traction!

      I did stop for pictures in all the best spots

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      Echo Lake at Mount Evans showing off my new plate

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      Elephant Butte Park and Denver

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      Close up

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      Veefalo on Squaw Pass

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      Juniper Pass

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      Juniper Pass

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      Mount Evans

      My route A is home B is Tommy-knockers

       

    2. MartinkaP's Blog

      A blog by martinkap in General

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      martinkap
      Latest Entry

      I Am Back !

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      Not that it matters and not that I expect anyone had noticed, but to those who sent me "where are you?" I would like to say I am back. Not only that I am officially returning to VFRD after nearly 2 months break but I have also ridden my Hawk last weekend and had FUN! Let me restate that; I had major fun riding! Something I have almost given up on.

      Most of you have been riding your whole adult lives and riding is not only a hobby to you, it is part of you. But I started riding three years ago and even though I have encounter some setbacks, till this spring I loved riding with whole my heart. However, I have always considered riding as my hobby. As a hobby which suppose to make my life better, more fun and more rich. Life is too short to do something which we don't fully love.

      My love of riding received a first major scar this spring: I lost a friend on the racetrack. He was a total stranger who offered me his help after I lowsided at CMP track last year. I still remember hearing his "Hi, my name is Todd, do you need help?" while I was duct-taping my roadrash from ripped jacket. He helped me straighten up the shifter and we kept in touch. The next time we saw each other was the day he died.

      With 9 months delay, I can say that Todd's death shook me more than I have realized. It rooted fear in me which was fueled by seeing and hearing about others getting hurt over and over again. If I was to summarize this year - it would be one big accident report. I became sensitive to every broken bone, every roadrash, every lowside. And even though I did 10 track days this year, I became slower and slower and slower. Suddenly, I have acquired this 'grandma' riding style on the road, frozen with fear that behind every corner there is car standing in my lane, or major sand trap or deer staring at me ... I was crippled with fear not only for me about also for my fellow rider.

      So, at the end of this year, I rode more and more by myself. I could not bear the feelings of responsibility for others on the road and my lines were crippled by my own fears. It all culminated this fall at WDGAH. In a freaky accident Love2rideh82crash was taken down by a truck crossing into our lane. I was done. I finished the weekend, locked the VFR into a garage and took a break.

      Until the last weekend, I pretended that motorcycles do not exists. As a last instance after 2 months break from riding, I decided to go to CMP track to see if I can still have fun. I also felt like I should go for the memory of Todd. I went and I had fun! I had much more fun than I expected and the most fun on track I can remember. Suddenly the whole track connected into an uninterupted line of turns and I felt one with the bike riding around! I was giggling like a little girl in my helmet and keep on giggling ever since smile.gif

      Granted I was not the fastest one and through out the weekend, I have never exceeded about 60% of my riding abilities, but I had no "oh-shit" nor 'blond' moments. I could have maybe go faster, I could have brake later for the turns and I could have lean further, but I am no Rossi nor Stoner. I decided to ride for fun and I had amazing blast riding well within my comfort zone.

      I was proud of myself when, after bandaging Ricks arm, I was able to distance myself and go back to riding without the year-long fear. I did feel bad for him but the feelings were not crippling my lines nor my mind. And when a total stranger came to me and said "Hi, my name is Todd", my heart stopped for a minute though but I suddenly knew that my life went a full circle. I probably will never win MotoGP :idea3: , but I am back! :wheel:

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