boonman Posted March 9, 2005 Report Share Posted March 9, 2005 Usually, when the flywheel is out of round so to speak, that's where mother Yamaha folks drill the lightening divits in them. There is no need to re-balance. It's already balanced . If you must do it yourself, be very careful. Do not go too deep on your cut. I do not recommend cutting alot off the face either. I have seen plenty of flywheels break there. Keep in mind that the outer part of the flywheel is only riveted onto the center hub. For an accomplished machinist, you could do it. If you have a lathe you can use, go for it. if you have a lathe you have seen once, and you think you can do it, don't bother. It would be an expensive mistake. Also, you ned to have the proper tooling to get a good finish on it. Some of the wheels chatter easily and give you a horrible finish. I am sure BDBanshee has seen the same thing. Quote Link to comment Share on other sites More sharing options...
PUSH THE THROTTLE Posted March 9, 2005 Report Share Posted March 9, 2005 Do not go too deep on your cut. I Quote Link to comment Share on other sites More sharing options...
BadDad Posted March 9, 2005 Report Share Posted March 9, 2005 Usually, when the flywheel is out of round so to speak, that's where mother Yamaha folks drill the lightening divits in them. Just where the (.007) hump is. The truing mark after kissing off with the tool tip is right beside the 2 drilled divets. If you must do it yourself, be very careful. Do not go too deep on your cut. Here are the specs I've disected from the searches here at "BHQ": 4.840" O.D. And don't cut the timing tabs off. Turn the center hub up to the rivits, with a resulting O.D. of 2.800". For an accomplished machinist, you could do it. If you have a lathe you can use, go for it. if you have a lathe you have seen once <snip> Also, you ned to have the proper tooling to get a good finish on it. I can't claim to be an accomplished machinist but it's my own lathe in my basement (it's like a 12x52 or close) that I'm comfortable with. I only use carbide tips (ceramic if i have to). This was one of those things I didn't know enough about to feel comfortable and just do. Some of the wheels chatter easily and give you a horrible finish. <snip> Maybe I can help here. Get yoursely a couple dozen of those wide wide gum-bands. Now wrap them anywhere that is not your cutting surface. It will reduce the harminics sometimes to a point where it is un-noticible. I've used the same techince on other drums with good success. What the hell, it looks good on paper. Thanks Quote Link to comment Share on other sites More sharing options...
rocketboy Posted March 10, 2005 Report Share Posted March 10, 2005 as posted earliier it isnt worth the hassle ,i just sent mine out and the local machine shop did mine and i drew up a print and he cut it to print,mine is lightened more than any ive yet to see.i wouldnt waste my time indicating and changeing out cutters and worrying anout chatter and the damn thing will come undone and fly up at you,that gummy hard chrome they make em out of sucks to machine its a real pain and if you dont have the right tooling and know how ,itll turn out real shitty that is if you dont scrap it,im a tool and die maker,i do all kinds of machining of parts everyday and for me it wasnt worth the bother for the good price you can get one done for.and the whole less torque and increased wheel spin is the single biggest banshee myth going .its a lie.lightened flywheels vastly improves the way your bike makes power... period,it is pure gain and no drawbacks that ive seen whatsoever. kinda like cutting a stock head .030 and +4 timing advance,pure gain everytime Quote Link to comment Share on other sites More sharing options...
BdBanshee Posted March 10, 2005 Report Share Posted March 10, 2005 Also, you ned to have the proper tooling to get a good finish on it. Some of the wheels chatter easily and give you a horrible finish. I am sure BDBanshee has seen the same thing. 336208[/snapback] Oh yeah! 1st thing is to have it mounted to the arbor solid, I would never chuck up on the flywheel. Then having the proper tooling and know how to machine it chatter free. Quote Link to comment Share on other sites More sharing options...
westexgt Posted March 10, 2005 Report Share Posted March 10, 2005 Well the question is, how much does it cost? I have a couple flywheels I would like to get done, you got a 2 for 1 deal going? Kevin Quote Link to comment Share on other sites More sharing options...
ellison445 Posted March 10, 2005 Report Share Posted March 10, 2005 Word!!! Well the question is, how much does it cost? I have a couple flywheels I would like to get done, you got a 2 for 1 deal going? Kevin 336886[/snapback] Quote Link to comment Share on other sites More sharing options...
BdBanshee Posted March 11, 2005 Report Share Posted March 11, 2005 Well the question is, how much does it cost? I have a couple flywheels I would like to get done, you got a 2 for 1 deal going? Kevin 336886[/snapback] PM Boonman or myself, we both lighten them. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.