Ok can I (no I am) grinding down a 525 front sprocket to make it 520 width.The reason is I need a 14t 520 front sprocket asap as I have an event this weekend featuring TWO humps where my bike will leave the road surface, not unlike Balaugh Bridge leap. Now I know my chain needs to have more freeplay as its, verging on tight now and with the compession of the swingarm on landing the wheelbase will get longer. Theres no time to get a new one ,so has anybody done this before. It seems a simple operation, in fact I;m halfway through doing it now, but anybody see any pitfalls. Sorry about lack of paragraphs but my return key doesn't seem to be working?
Ok done perfectly , trouble is pitch being slightly different it's not fitting smoothly enough between the chain rollers DOH! Why didn't someone tell me . so one ordered from my mate who runs an Aprilia dealership , should be here in two days I hope.
I would buy a Renthal sprocket for £14 - £20 + next day delivery.........Got to be worth losing all that effort grinding one down. As I assume you are grinding down the outside face only, which will come against the retainer as normal, I don't see any issues at all unless the sprocket overall width through the centre is significantly thinner than an aftermarket 520..........but even then I can't imagine it will have that much effect on anything.........unless pitch is a problem. PS...........Takes bl**dy ages, doesn't it! AL
Thanks Ricky , I used a grinding wheel and it fits perfect except when you run the chain through its not as smooth as it should be which tells me that the 525 has ever so slightly larger rollers , I thought that the pitch just meant width but obviously its a percentage of the whole thing. So I'm giving my mate a ring tomorrow to see if he's got a longer 520 chain in stock, that'll solve my problem (numpty).
No problem at all OTHER than the chain potentially snapping due to poor fitment and then eithe smashing the cases, the exhaust, your leg or if you are really lucky all 3. You cannot be serious? Stainless steel and you are trying to reshape it?
The sprocket is not stainless steel. The retainer also locates the axial position of the sprocket. I doubt whether the necessary precision can be achieved by grinding by hand
LOL and double LOL , I am prone to Sid James moments, I have now found the spare links from the chain and put an extra link in. Grounding down the front sprocket was easy by the way as I am a skilled grindist.
He wasn't grinding it.........He had it held in the vice vertically and was cutting a slice off the outer face with a hacksaw...... ..........that's accurate enough............:wink: .......and he has a new pack of 400 hacksaw blades...............three left now
Slight red moment happening here. :smile: keep em coming I can take it. ----- Just. Arseholes.:biggrin:
And then.........when it came to the rear one..........well......................................:wink:
