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Crank
Posted: March 5th, 2009, 1:55 pm
by rickyrcf
What is the story on the tin on the crank? Does it need to be there? What
is its purpose? what are the effects of removing it? My crank should arrive at Surf & Turf tomorrow, So I have options.
Thanks, Rick
Posted: March 5th, 2009, 2:17 pm
by MICK
I think it was a kind of crank stuffer? I don't have it anymore and I couldn't tell you one way or the other it might have effected anything. If you sent it to STR I would have told you to take it off yourself and save $100 that they're gonna charge to do it for you...too late.
Posted: March 5th, 2009, 8:57 pm
by high velocity
I removed the crank casing on my 125 conversion.It also has a cr250 ign on it.It seems to rev up really fast. Will let you know how it runs when i ride it, just waiting on the pipe to show up. It seems to rev so fast that the front forks compress!
Posted: March 6th, 2009, 11:10 am
by rickyrcf
I just talked to Steve at STR, he said definately leave it on.
Posted: March 6th, 2009, 12:37 pm
by MICK
That makes alot of sense
They took mine off and that was the last I ever seen of it...Did you ask him for what purpose?
Like I said, I couldn't tell a difference with or without.
Posted: March 6th, 2009, 9:07 pm
by mega491
My guess is it addresses windage and volume issues.
Posted: March 7th, 2009, 5:16 am
by rickyrcf
Posted: March 7th, 2009, 8:22 pm
by Wheelie-Gene
The tins seal the voids.
Remove the tins and you end up w/more crankcase volume.
Less volume = a stronger exhaust pulse.
The minimal savings in rotational mass doesn't outweigh the possibly of hurting performance.
Posted: March 8th, 2009, 3:53 pm
by nmdesertrider
you won't notice a difference
Posted: March 16th, 2009, 8:41 pm
by high velocity
I finally got to ride/race my new bike this weekend.The motor runs verry well with the crank tins removed. I got a massive holeshot.Some of the guys in my row came over to our pits after the race just to find out what the hell i was riding!
