Hello, I would like to put bigger tyres to my RC24 (gen 2, 1988). Orginal tyres are in front 110/80-17 and back 140/80-17. My plan is put front 120/70-17 and back 160/70-17. Has any one done that? what modifikation need to do? In front i maybe could use gen 3 front tyre/rim. Are the front forks in same distance from each other? In RC24 distance is 192mm. So do I need chance front yokes? Could someone measure fork distance from gen 3 ->? In back has any one but 160/70 tyre to orginal 3,5" rim? Should I use wider rim and where I can find it? cbr1000f or cbr600? RC24 swing arm is different than later vfr´2 so I can´t use gen 3-> back rims.
I have 1988/89 triple clamps on one of my 1986 VFRs. The Gen 3 wheel will go on, but you will lose your speedo drive. You can use the 1991 - 1994 CBR600 front wheel (same 3.5") and retain a speedo drive. You can't (shouldn't) put that big of tyre on the 3.5 stock rim. You will destroy the profile and end up with less rubber meeting the road. There is some modifications needed to put a 1991-94 or 1995-98 rear CBR600 rim, the biggest being a rear brake solution. With the correct left spacer you can get the wheel centered, but getting chain center correct takes modifying the hub or flipping an OEM style rear sprocket to put the "dished" portion to the inside, effectively moving the sprocket over a mm or two. Check out my rear brake sticky https://vfrworld.com/threads/rear-brake-options-for-rc24-26-wheel-swaps.59847/
Thank you very much. This is good information and exactly what I was looking for. I think you have done a great job with the parts and documentation.
https://imgur.com/VdZtUAC.jpg A 1991-1994 CBR600F front wheel slots straight in the front and lets you have a 120/70R17 front. A 1995-98 will fit and brings floating discs but loses the speedo drive. You'll need original RC24 brake discs (aftermarket or RC36-1 are too thick), lose the damping shims and it will *JUST* fit. https://i.imgur.com/S91T22Y.jpg (note that although those *look* like RC36-1 discs, they're actually Deauville which are 4.5mm thick the same as the originals). You can equally fit a CBR600F 91-94 or 95-98, the 91-94 is 4.5" wide, the 95-98 is 5" wide. Both will take a 160. Personally I went with a 95-98 and a 160/60R17 but that does drop the rear quite a bit, you need a longer shock to bring the back up again. For spacers you need a 14mm spacer on the left (use the original one from the CBR600F) and then space the right to suit your brake setup. If you're using the original brake caliper then you'll need a 16mm (between the wheel and bracket) and an 8mm [45mm diameter] spacer (between the bracket and swingarm). Note that 91-94 and 95-98 have different size seals on them. 91-94 are 34mm diameter, 95-98 are 30mm. https://i.imgur.com/lvTZSgT.jpg You can fit a Triumph rear disc (from one of the following), re-use the original caliper and bend the torque arm then mount it to the right side off the boss rather than the left...although beware if you bend it that its easy to crack it. I didn't use enough heat on one of the bends and had to weld it up after. Bonneville 790-01/06 Bonneville 865-12/13 Bonneville 865 SE/T100-12/13 Q-Bike-12/13 Scrambler 865-06/13 Steve Mc Quen 865-12 Thruxton 865-04/13 The Runner-12/13 Sprint RS 955-00/04 Sprint ST 955-98/04 Speed Triple 1050-12/13 Speed Triple 1050 ABS-12 Speed Triple R 1050-12/13 Sprint ST T 1050-05/11 Tiger 1050 / ABS / SE-07/13, https://i.imgur.com/kKEtB6b.jpg Chain is actually surprisingly easy, just use an RC30 525 front sprocket (obviously with a 525 chain and sprocket on the back). https://i.imgur.com/FkO0exK.jpg Although the sprocket is meant to float (the bolt/washer tightens on the shaft not the sprocket) the RC30 is 16.0mm rather than 16.7mm thick, personally I constrained it from floating massively with some shims but you don't *need* to. I did find the chain guard rubbed very slightly on the wheel, some people have left it off but I just spaced it out slightly and used longer bolts.
