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Title: MBP Collets Post by: He Man on May 20, 2010, 09:33:28 AM Someone is selling a set of used 7mm collets. Was thinking about getting them for my bike. I remember someone said they arent as good as they claim it to be.
Are they just straight replacements? I have to do my 18,000 service ( at 17,300 right now and have free time) Title: Re: MBP Collets Post by: Christian on May 20, 2010, 10:56:10 AM Most of the folks I've talked to have gone with the "keep it stock" and "they aren't worth the hassle" route. I personally run stock collets and plan to indefinitely.
Title: Re: MBP Collets Post by: junior varsity on May 20, 2010, 01:29:45 PM not a trivial install. useful if hitting high rpms often.
Title: Re: MBP Collets Post by: He Man on May 20, 2010, 01:35:20 PM not a trivial install. useful if hitting high rpms often. do the collets require you to get all new shims? or does it not change the measurement? Title: Re: MBP Collets Post by: mojo on May 20, 2010, 04:21:41 PM I'd imagine new collets would tighten up the measurements on the closing shims. The original collets probably wear in and flatten a bit where the shim contacts it.
I just did a valve adjustment on my bike, and 6 of the 8 collets were in pieces. I just ordered stock replacements from Commonwealth. Title: Re: MBP Collets Post by: He Man on May 20, 2010, 04:43:30 PM heh. im afriad mine are broken to. The closer was within the new spec @12,000. so i let them be and sanded down the openers a bit. now im at 18,000 and the bike is running like absolute crap. but theres a lot of PM work i need to do. I havent changed oil in a while, and the clutch basket is worn to shit. etc. got a lot of work to do next week.
anyway i bought them for $50. figure even if i dont need them, they are worth the cost since i might be needing new closers anyway. Title: Re: MBP Collets Post by: junior varsity on May 21, 2010, 03:01:53 AM yeah, if you got a deal, might as well throw them in. On the project 900 motor I've got, one or two of the half rings were broken, and I thought "GOOD! I was going to replace you anyway!"
Title: Re: MBP Collets Post by: He Man on May 21, 2010, 04:27:55 AM [evil]
I cant wait to do my valve adjustment. the bike is running horrible right now. :'( i almost hate riding it. Title: Re: MBP Collets Post by: Silver King on May 21, 2010, 07:02:42 AM [evil] :'( i almost hate riding it. Shhhhh! She might hear you. ;D Title: Re: MBP Collets Post by: He Man on May 21, 2010, 07:57:12 AM Shhhhh! She might hear you. ;D who cares shes locked up right now. Title: Re: MBP Collets Post by: crimsoncloak on May 21, 2010, 09:21:33 AM At the rpms the 2-valvers hit, they don't offer much improvement.
If you have something that spins 12~13K, they are indespensible. I did a whole season of trackdays with my 748 last year with no adjustments needed. That includes plenty of 11K~12K thrashing, and big cams with oversize valves. Would be a good choice for a S4 / S4R / S4RS if you like winding it out. Title: Re: MBP Collets Post by: junior varsity on May 21, 2010, 09:30:57 AM (or a 2V that's tuned up pretty high with race cams... [evil])
Title: Re: MBP Collets Post by: He Man on May 21, 2010, 10:09:18 AM at $50. im not going to complain. if my half rings are broken since ive neglected them for so long, ill consider it a cheap alternative to the OEM ones. :p
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