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Got a RC24 again......


keny

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Despite difference in outer casting, decided to go whit the led lower I bought, left in picture below 

large.IMG_20240601_100611.jpg.e76ddd6b03d1cf8f0b5241110fa8792d.jpg

The orginal has smoother surface under paint 

Well as you have the lower (inner) slide bushes side by side the old sure totally shoot 

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The upper (outer) bushes only other was really worn, well as I had the new ones I sure did put them in.

 

The bolts for the leg lowers, the one I bought came whit the OEM bolts, the orginal on bike was not orginal, but have to do, sham as I really like the design of the bolt head on the OEM bolts.

large.IMG_20240602_093657.jpg.96a4e7e8893cd2f1d45c70ffe6f99ed7.jpg

A other thin is also the orginal is for 12mm socket where the aftermarket/ universal bolt use a 13mm

 

So finally after some time the fork legs are together and bike standing on the front wheel 

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So next front brake calipers together whit new seal kit, then I need to take the carbs off to change the flower bowl O rings and see if other surprise's are found....

And by the way, a aluminum washer sorted the oil leak at the drain plug

large.IMG_20240602_100001.jpg.87b344b79be71d6ba105694e50ef7a65.jpg

 

A other thing to sort if I don't use the old dash whit orginal fairing, of course, is to modify to attach the round clocks 

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On 5/31/2024 at 9:02 PM, Captain 80s said:

I actually think they sourced the 1987/88 CBR1000F forks for the 88/89 VFRs.   They look identical (and are both 41mm damping rod forks), use the same size rotors and they have the lower unused mount for the big aero CBR front fender.

 

s-l1600.thumb.webp.ec77d5cd9ec014c3e7a52095fdb8d4e5.webp

 

 

EDIT:  Yep.  Just confirmed it with parts numbers.  The lowers sliders are the same part number.  Chrome tubes are not, probably a different length

 

I'm sure you know this @Captain 80s but for others sake. The middle part of the part number is the PCN or "Product Code Number". This is the unique code that refers to the bike the part was originally designed for. In the case of the lowers, the right one is 51421-MM5-003 so as you correctly deduced that part carries the PCN "MM5" which refers to the "CBR1000FH-J (Hurricane) 1000" (SC21). The stanchions carry a ML7 PCN which means they originated with the VFR750F. There is a good list of PCNs here https://www.vsource.org/VFR-RVF_files/BHondaPCNs.htm

 

Also if anyone is really curious, the initial part of the part number refers to the type of part, the last part refers to the revision. 

 

Finally, you will often see parts superseded for improved versions in new models, looking for example at the 88 fork 'fiche the upper guide bush originally was a "MB4" ( VF1100 / V65 Magna) part but has been updated and replaced by the later "KCR" (VT250CR) part. 

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On 6/2/2024 at 8:48 AM, keny said:

The bolts for the leg lowers, the one I bought came whit the OEM bolts, the original on bike was not original, but have to do, sham as I really like the design of the bolt head on the OEM bolts.

large.IMG_20240602_093657.jpg.96a4e7e8893cd2f1d45c70ffe6f99ed7.jpg

A other thin is also the original is for 12mm socket where the aftermarket/ universal bolt use a 13mm

I'm not a fan of using A2 stainless bolts for anything other than "cosmetic" purposes, ie never in critical places. They're straight up not as "strong" as a 8.8 (roughly 2/3rd of the yield strength) and more worryingly you can't be sure what grade the originals are either, they may not "merely" be an 8.8.  

 

When I run into this situation I use OEM bolts or properly suitable replacements. It's not exactly clear which bolt it is but as far as I can tell all of the bolts are still available new from Honda and for the sake of a few £/$ personally I'd be buying new ones.

 

 

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Some work processes.

First I did rebuild the CBR1000F clutch master cylinder, as I plan to use the clutch as Brake master cylinder on the RC24, 

Clutch is same size, 14mm, brake is also 14mm vs VFR 16mm, but from 88 on the VFR use a 13mm one. The smaller piston give a little longer pull but also more feel in the brake level.

Well there was same kind of mustard like stuff in the M/C as I opened it like in my ZR7S brake M/C

large.IMG_20240609_075336.jpg.84c073eb62b23740814658281268fa67.jpg

Other than cleaning all ait was a straight forward jobb 

large.IMG_20240609_081755.jpg.d2f21ce123bfec7960aa813b6c081280.jpg

 

Next up to put brake calipers together 

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Sadly I noticed that the cheap rebuild kit had a catch, the rubbers for the sliding pins are missing 🤔

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So they are now ordered as the wear plates for the brake pads. So a wait needed before I can mount the front brake 

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On 6/3/2024 at 3:46 PM, Fastdruid said:

I'm not a fan of using A2 stainless bolts for anything other than "cosmetic" purposes, ie never in critical places. They're straight up not as "strong" as a 8.8 (roughly 2/3rd of the yield strength) and more worryingly you can't be sure what grade the originals are either, they may not "merely" be an 8.8.  

 

When I run into this situation I use OEM bolts or properly suitable replacements. It's not exactly clear which bolt it is but as far as I can tell all of the bolts are still available new from Honda and for the sake of a few £/$ personally I'd be buying new ones.

 

 

The non OEM bolts there are not stainless, just zinked.

Added washer's, worked ok.

 

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14 hours ago, keny said:

The non OEM bolts there are not stainless, just zinked.

Added washer's, worked ok.

 

The picture was of an A2-70. That's stainless not zinc!

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6 hours ago, Fastdruid said:

The picture was of an A2-70. That's stainless not zinc!

Ok, I thought they where zinked ones.... Didn't look at the marks on the bolts as stainless usually just used for boat's here.

Guess former owner had put stainless bolts then as I sure don't have stainless bolts around.

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So tank off to dig the crabs off.

Air filter was nice looking 

large.IMG_20240612_100242.jpg.70e1b72faf7f3d95f49e43b777e8b012.jpg

 

But can't figure out why attach a aluminum bit to the fuel line from pump to carb 🤔

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As heat shield only I can think of, but as it's attached to the fuel line the aluminium will only warm the fuel line I think 

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Hmmm, no heatshield on the back of the engine between the frame and head (I initially thought it was "missing" but looking at the fiche and appears the 86 didn't have one, or at least isn't listed). 

 

I wonder if there was an excess of heat there and that was an attempt to fix it, ultimately if the heat is coming from the exhaust there it's going to be pretty pointless though. 

 

Mine here for context. 

image.jpeg

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3 hours ago, Fastdruid said:

Hmmm, no heatshield on the back of the engine between the frame and head (I initially thought it was "missing" but looking at the fiche and appears the 86 didn't have one, or at least isn't listed). 

 

There is absolutely a heat shield on an 86.  It is shown with the frame.  It helps protect the shock.  #12

 

GUARD, RR. CUSHION HEAT

50175-ML7-000

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7 hours ago, Fastdruid said:

Very bizarre. It looks like it's kind of trying to keep the fuel line off the head but why I don't know. I can only assume it was an attempt to fix a perceived problem. 

Only thing I can think of is that when the pickup coil problem started someone put it there to eliminate the fuel line didn't run to warm to get running issue 🤔 🤷

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19 hours ago, Captain 80s said:

 

There is absolutely a heat shield on an 86.  It is shown with the frame.  It helps protect the shock.  #12

 

GUARD, RR. CUSHION HEAT

50175-ML7-000

Different heat shield. That's the shock heat shield (#13 on the diagram below). I'm referring to #15 (50177-ML7-920 "GUARD, RR. HEAD HEAT")

image.png.4b753632c8c4a4548e1265819cb4d20c.png

 

Shown on the '86 diagram because they update the diagrams for the older models based off the newer ones... but not listed in the parts list. 

 

image.thumb.png.22de0c76270fae38a0ee62d363c228af.png

 


And to make it clearer, here is my photo again with it highlighted. image.thumb.png.a53bc1acf97088663084b88ce11b5eda.png

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Well carbs off, intake rubbers hard as a rock, new ones ordered so just a wait for them also. Well better get into the carbs during that

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And for that heat shield, non on my 86 ither

large.IMG_20240615_075409.jpg.de64b76bd03c0e7c93bfb5ffab054298.jpg

But I wonder if my former low vin 86 had one, it had some other other bits I has not seen on other RC24's, like small heat guards on the silencers/mufflers behind passenger fotpegs 

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