keny Posted September 17, 2023 Author Share Posted September 17, 2023 I'm a bit leaning towards a 88-89 ECU, even perhaps a complete 88-89 electric system. I got a picture of how to change the 86 wiring to work whit the 88-89 ECU (from a member in a RC24 FB group), not that hard actually. A 88-89 ECU is also not hard to find for reasonable money, the pulse generators I have. I could live whit the fact the rpm meter don't show accurate reading, but could probably score a slightly damaged 88-89 to take the rpm meter from. I don't know why I wa told I need a 87-> fuel cut relay as the plug for it, might be they are for different trigging? The nice thing whit a complete 88-89 clock would be a Clock as a fuel guage, but that means a fuel level sensor as a different fuse box. Well one part that also is essential for 88-89 ecu is the starter clutch that works as a trigger wheel, and it's same part from 87 to 97! But second hand it's hard to find, new is a 200€ spending.... Quote Link to comment Share on other sites More sharing options...
Fastdruid Posted September 17, 2023 Share Posted September 17, 2023 The fuel pump relay is different between the 86, 87 and 88-89. 86 has a trigger from the ECU (also shared with the tacho): P/N 36100-ML7-013 87 has a trigger from coil #3: P/N 36100-MB1-701 (Updated MB1 so updated VF750 V45 part) 88-89 has a trigger from coil #4: P/N 36100-MN4-008 (CBR600F (PC19) part) So you need to change it because the tacho output from the ECU is different on the 88/89[1]. Now I did hear someone say once (but I'm not sure how true it is) that the 86 basically used a "repeater" from one of signals to the coils on the tacho/fuel cut so you may get away with just connecting it up to a coil, or you may not! I'm sure an 87 one would work if you linked it to a coil but because the 88-89 was used in a massive multitude of bikes there are more available! Also aftermarket ones available. Used in CBR600 from 87 up to at least 2000 as well as many other bikes. [1] On a related note, at some point I really, really should lug the oscilloscope outside and see what signal the 88-89 is actually outputting on the tacho line (I think it's a 10v square wave). Quote Link to comment Share on other sites More sharing options...
Fastdruid Posted September 17, 2023 Share Posted September 17, 2023 On 9/15/2023 at 5:15 PM, Captain 80s said: I had to take the clutch cover off of my Hawk GT after installing a new gasket the season prior. It tore in a couple places. I didn't touch a thing, but gave both sides a gentle wipe with some contact cleaner on a rag, and put a nice, thin even smear of Hondabond 4 around the whole cover side (cuz that was the easiest on the bench), perhaps giving a little extra attention at the breaks. Let it dry overnight before adding oil (and not tilting it vertical) and not one leak all Summer long. Nice. Mine ripped in multiple places and left some on one side, some on the other! Gasket was a good 15 years old though. Quote Link to comment Share on other sites More sharing options...
keny Posted September 18, 2023 Author Share Posted September 18, 2023 Did score a 86 pulse generator on ebay! From Australia! 4 Quote Link to comment Share on other sites More sharing options...
Member Contributer airwalk Posted September 18, 2023 Member Contributer Share Posted September 18, 2023 Hopefully they work! Quote Link to comment Share on other sites More sharing options...
keny Posted September 18, 2023 Author Share Posted September 18, 2023 56 minutes ago, airwalk said: Hopefully they work! 🤞 Quote Link to comment Share on other sites More sharing options...
keny Posted September 20, 2023 Author Share Posted September 20, 2023 Score of a good clutch line for 10€ The one on bike not so convincing.. That breaker did have a lovely 1986 RC24 that thankfully is staying as a bike, owner will hold it in his collection 3 Quote Link to comment Share on other sites More sharing options...
Fastdruid Posted September 20, 2023 Share Posted September 20, 2023 I was going to say that's a VFR700F RC26, the lack of "750" on the lower fairing is typically the giveaway...but actually both the "VFR" and the "V4 GEAR DRIVEN CAMS" on the fairing are wrong so it's almost certainly been repainted at some point and it could easily be either a 700/RC26 or a 750/RC24. Almost impossible otherwise to know without getting up close and checking the VIN or plate. Still my favourite colour scheme for them. VFR700F RC26 VFR750F RC24 3 1 Quote Link to comment Share on other sites More sharing options...
Member Contributer bmart Posted September 20, 2023 Member Contributer Share Posted September 20, 2023 To my untrained eyes...they look the same. Quote Link to comment Share on other sites More sharing options...
Member Contributer Captain 80s Posted September 20, 2023 Member Contributer Share Posted September 20, 2023 To my trained eye...they look the same. Like he said, unless you can read the VIN or see the cc on the engine, the only visual cue on a stock bike is the "750" graphic. Quote Link to comment Share on other sites More sharing options...
fabio222 Posted September 20, 2023 Share Posted September 20, 2023 Looks gorgeous! Quote Link to comment Share on other sites More sharing options...
keny Posted September 21, 2023 Author Share Posted September 21, 2023 18 hours ago, Fastdruid said: I was going to say that's a VFR700F RC26, the lack of "750" on the lower fairing is typically the giveaway...but actually both the "VFR" and the "V4 GEAR DRIVEN CAMS" on the fairing are wrong so it's almost certainly been repainted at some point and it could easily be either a 700/RC26 or a 750/RC24. Almost impossible otherwise to know without getting up close and checking the VIN or plate. Still my favourite colour scheme for them. VFR700F RC26 VFR750F RC24 Can actually be it's a bike made to look like a US/Canada RWB bike, thro it has the right instrument as top triple as engine covers. Can be it's just repainted in som point because of a damage? Don't know it's vin so I can't tell Quote Link to comment Share on other sites More sharing options...
keny Posted September 21, 2023 Author Share Posted September 21, 2023 Well I have tough quite a bit on how I will proceed whit the RC24 . In a way a RWB paint would be cool. On a other way I like the red as the brochure from 1989 got me to really like the RC24 Then I also more and more like the color of the 87 I had back in time But also would like to turn it into something like one member here has done, on a 700RC26, hope ok I share a picture of it! It's sure a sweet build! Have to see what I go for, for starters think I just se it works ok and put some miles/kms on it as it is after I get the pulse generators as change the clutch line. Then go thro it technically during winter. 1 Quote Link to comment Share on other sites More sharing options...
Fastdruid Posted September 21, 2023 Share Posted September 21, 2023 40 minutes ago, keny said: But also would like to turn it into something like one member here has done, on a 700RC26, hope ok I share a picture of it! It's sure a sweet build! That 'blade fairing works surprisingly well. Being picky to fit perfectly it wants the mid panels to be longer so the belly pan sits lower and the radiator vents to be more "lined up" with the actual rad but that would be an astonishingly large amount of work to pull off for what is intended as a track bike! Quote Link to comment Share on other sites More sharing options...
Fastdruid Posted September 21, 2023 Share Posted September 21, 2023 1 hour ago, keny said: Can actually be it's a bike made to look like a US/Canada RWB bike, thro it has the right instrument as top triple as engine covers. Can be it's just repainted in som point because of a damage? Don't know it's vin so I can't tell It could be but I believe the rounded clocks etc were only ever for the RWB scheme in the US/Canada market and they only got the "square" clocks for the VFR700F2 while everyone else just had the square clocks (and no RWB option). It's not impossible that someone has rebuilt a non-US bike with US parts as RWB but IMO a far higher probability it's an "import" (which also makes it a higher probability it's a VFR700F RC26). Quote Link to comment Share on other sites More sharing options...
Member Contributer Captain 80s Posted September 21, 2023 Member Contributer Share Posted September 21, 2023 5 hours ago, Fastdruid said: That 'blade fairing works surprisingly well. Being picky to fit perfectly it wants the mid panels to be longer so the belly pan sits lower and the radiator vents to be more "lined up" with the actual rad but that would be an astonishingly large amount of work to pull off for what is intended as a track bike! There's always decisions and compromises to be made in doing something like this. Most importantly, the headlights need to be at the right height (low enough), and far enough forward, and still allow room for the front fender, gauges and clip ons.. Most custom attempts I see, the cowl is way too high and back and looks off. After that making sure the sides match the the angle of the frame. Everything else is what it is. The rad openings are not terribly off to vent. The lowers? make adjustments and hope it looks decent. Lines look good, cowl mounts are in reasonable places. Pretty fucking hard to take Blade fairings made for a super short bike with clipons under the top clamp, and fit to an old, tall bike. 2 Quote Link to comment Share on other sites More sharing options...
Fastdruid Posted September 21, 2023 Share Posted September 21, 2023 33 minutes ago, Captain 80s said: There's always decisions and compromises to be made in doing something like this. Most importantly, the headlights need to be at the right height (low enough), and far enough forward, and still allow room for the front fender, gauges and clip ons.. Most custom attempts I see, the cowl is way too high and back and looks off. After that making sure the sides match the the angle of the frame. Everything else is what it is. The rad openings are not terribly off to vent. The lowers? make adjustments and hope it looks decent. Lines look good, cowl mounts are in reasonable places. Pretty fucking hard to take Blade fairings made for a super short bike with clipons under the top clamp, and fit to an old, tall bike. Absolutely. It would have been a pig of a job cutting and joining multiple sets and for very little gain, particularly for a track bike where chance of damage and having to replace it is high! The RC24 while a sports bike for its era is very different dimensionally to later sports bikes and most efforts to fit a different fairing (or seat) look really wrong. Yours with the 'blade fairing works really quite well. Quote Link to comment Share on other sites More sharing options...
Member Contributer Captain 80s Posted September 21, 2023 Member Contributer Share Posted September 21, 2023 2 minutes ago, Fastdruid said: Absolutely. It would have been a pig of a job cutting and joining multiple sets and for very little gain, particularly for a track bike where chance of damage and having to replace it is high! The RC24 while a sports bike for its era is very different dimensionally to later sports bikes and most efforts to fit a different fairing (or seat) look really wrong. Yours with the 'blade fairing works really quite well. Thank you. Started as a Track Bike. Came out so good, I finished the build with the street equipment and then later swapped in a frame with a title. Getting ready. Titled bike on the lift with another engine. It actually made the swap easier and now I have the original engine completely restored as a spare. 3 Quote Link to comment Share on other sites More sharing options...
keny Posted September 21, 2023 Author Share Posted September 21, 2023 Actually a other faring whit twin headlights that could possibly fit, what I think, as the orginal bike is a bit higher is a 87-88 Yamaha FZR1000/750 faring Also a option to get twin headlights is a top fairing that French Poly26 make but sadly the company has a reputation of not so good build quality and still quite high prices... 1 Quote Link to comment Share on other sites More sharing options...
Member Contributer bmart Posted September 21, 2023 Member Contributer Share Posted September 21, 2023 19 minutes ago, Captain 80s said: I have the original engine completely restored as a spare. I have spare socks... 3 Quote Link to comment Share on other sites More sharing options...
Fastdruid Posted September 21, 2023 Share Posted September 21, 2023 CBR1000RR can kind of be made to fit too. Although probably not with stock bars. 1 Quote Link to comment Share on other sites More sharing options...
Member Contributer Captain 80s Posted September 21, 2023 Member Contributer Share Posted September 21, 2023 33 minutes ago, keny said: Actually a other faring whit twin headlights that could possibly fit, what I think, as the original bike is a bit higher is a 87-88 Yamaha FZR1000/750 faring I just can't cross-pollinate like that. The only reason I even went down the CBR900RR path is because I got the upper with OEM headlights and bracket and the L & R mids for free. 1 Quote Link to comment Share on other sites More sharing options...
Member Contributer Captain 80s Posted September 21, 2023 Member Contributer Share Posted September 21, 2023 2 minutes ago, Fastdruid said: CBR1000RR can kind of be made to fit too. Although probably not with stock bars. Two round headlights were a requirement for an "RC" tribute. 3 Quote Link to comment Share on other sites More sharing options...
keny Posted September 21, 2023 Author Share Posted September 21, 2023 58 minutes ago, Captain 80s said: I just can't cross-pollinate like that. The only reason I even went down the CBR900RR path is because I got the upper with OEM headlights and bracket and the L & R mids for free. I recall you had them around yes, not parts you get for free these days... I know some can't think of parts from other make, I don't mind, that's probably why I have bikes from 3 different makes in my garage 🤷 The 900rr faring still look stunning through 👍 Quote Link to comment Share on other sites More sharing options...
Member Contributer tsmitty Posted September 21, 2023 Member Contributer Share Posted September 21, 2023 4 hours ago, Captain 80s said: Thank you. Started as a Track Bike. Came out so good, I finished the build with the street equipment and then later swapped in a frame with a title. Getting ready. Titled bike on the lift with another engine. It actually made the swap easier and now I have the original engine completely restored as a spare. Whats the story with the radiator reservoir? Looks like it freed up a lot of space. 1 Quote Link to comment Share on other sites More sharing options...
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