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Buell Forum » Old School Buell » Archive through February 26, 2011 » Balanced crank « Previous Next »

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Slayer5690
Posted on Friday, February 04, 2011 - 01:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm just curious but is any one on here running a balanced crank in their stock or racing tuber? I put one in my dads harley and my uncle's run them too and I'd like to know if any one has an opinion on them in a buell?
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Buellistic
Posted on Friday, February 04, 2011 - 03:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

IMHO, "i" would get my FLYWHEELS lightened and re-balanced ...
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Slayer5690
Posted on Friday, February 04, 2011 - 04:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

are you saying thats what you did?
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Buellistic
Posted on Friday, February 04, 2011 - 04:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Not yet, have a 110,423.85 miles as of the last ride and my engine has not worn out yet ...
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Slayer5690
Posted on Friday, February 04, 2011 - 07:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

lol it wouldn't be a preventative mod i was just curious if any one has done it. but a lighter and balanced flywheel is also a good idea
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Blake
Posted on Friday, February 04, 2011 - 11:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

 
Buellistic Posted on Friday, February 04, 2011 - 04:55 pm:       
>>> Not yet, have a 110,423.85 miles as of the last ride and my engine has not worn out yet ...




Pansy.
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Foximus
Posted on Saturday, February 05, 2011 - 03:40 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

just for another perspective on the topic....

Since I was just doing a complete rebuild on my motor, I was planning on sending my flywheel to dan at NRHS for lightening (and balancing)...

After talking to him on the phone, he actually convinced me not to do it. He said, not only does he not like the outcome, he doesnt even recommend doing it. He said the only reason you'd want to do it was if you were drag racing. On the street and track it makes the bike much less ridable.

So yea, the fact that he told me it was better not to give him my money, convinced me.
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Foximus
Posted on Saturday, February 05, 2011 - 03:40 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

though of coarse that only applies for lightening... not balancing.
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Buellistic
Posted on Saturday, February 05, 2011 - 08:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

One or two Models of the later BUELL Models had lighter flywheels than my 1997 S3T ...

In fact some of the BUELLers put them in their older engines ...
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Preybird1
Posted on Saturday, February 05, 2011 - 10:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That is the one thing i wished i had done when i built up my race bike motor. The cranks on these bike are not very balanced in the stock form.
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Daveswan
Posted on Saturday, February 05, 2011 - 01:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Here's some nice information regarding the compromise of balancing a Harley engine.

http://www.rbracing-rsr.com/enginetech.html
http://www.rbracing-rsr.com/downloads/sscycle.pdf
http://www.rbracing-rsr.com/balance2.html
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Slayer5690
Posted on Sunday, February 06, 2011 - 03:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm not interested in a lighter crank i was more interested in the balancing of a stock crank. lighter components like pistons and such i would be interested in but thats another story.
foximus: what did they say about balancing?

dave: thanks for the info, it was a good little read
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Dave_02_1200
Posted on Sunday, February 06, 2011 - 05:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have 2001 and 2002 Buells, both of which have the lighter cranks.

If I ever need a new crank I might go with an earlier heavier crank.

For street use I prefer the heavier flywheel because it results in a smoother motor (at the expense of quick revs).

Everything is a trade-off.
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