Larger diameter axle in RZ forks
Moderator: rztom
Larger diameter axle in RZ forks
I race a CB350 (Sorry about that) and the forks are tweaked.
I have a good set of RZ350 forks and triples that will fit the CB steering head with some bearing and spacing changes and I can get a couple of spacers made to fit the CB wheel between the fork legs (cast rims are not allowed as they are not period correct)
The problem is that the CB wheel has a 15mm axle. I’m wondering if there is enough meat on the Rz forks to have them bored to accept a 15mm axle or should I just use the 12mm with new bearings? I would imagine the 15mm axle would be an improvement
Thanks in Advance
I have a good set of RZ350 forks and triples that will fit the CB steering head with some bearing and spacing changes and I can get a couple of spacers made to fit the CB wheel between the fork legs (cast rims are not allowed as they are not period correct)
The problem is that the CB wheel has a 15mm axle. I’m wondering if there is enough meat on the Rz forks to have them bored to accept a 15mm axle or should I just use the 12mm with new bearings? I would imagine the 15mm axle would be an improvement
Thanks in Advance
Re: Larger diameter axle in RZ forks
I would look into getting the right bearings first. Then no modifications or butchery is needed.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
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Re: Larger diameter axle in RZ forks
Yes there is plenty of room to open up the axle holes. Radius would be only 1mm which for us Americans is only .040"
'85 RRZ350 - Hacked.
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Re: Larger diameter axle in RZ forks
Just a question - do the tripleclamps have a similar amount of offset? Are you going to end up with a different amount of trail that changes the handling?
"...its a 2-stroke ya twit - Its supposed to smoke..."
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Re: Larger diameter axle in RZ forks
Bore em out just make sure straight. Should be plenty of material. Larger axle should be improvement. The RZ one is microscopic for an axle.
Re: Larger diameter axle in RZ forks
just watch you don't bend the forks with the new super stiff axle...
i would base it on how new the bearings are, myself... will the axle really make that much difference on those forks?
i would base it on how new the bearings are, myself... will the axle really make that much difference on those forks?
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Re: Larger diameter axle in RZ forks
nokturnal makes a decent point. It is likely marginal improvement with a large axle but i've not done a back to back test. Given the comparable diameter of the tubes to the axle I would not be concerned about bending the forks.
Given the low cost of a proper replacement set of forks of around a hundred bucks your probably best to just find some replacements?
Given the low cost of a proper replacement set of forks of around a hundred bucks your probably best to just find some replacements?
Re: Larger diameter axle in RZ forks
was joking about the forks evan..evan_calgary wrote: ↑Wed Feb 27, 2019 11:54 pm nokturnal makes a decent point. It is likely marginal improvement with a large axle but i've not done a back to back test. Given the comparable diameter of the tubes to the axle I would not be concerned about bending the forks.
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