I rode one of Brens, it was ok right up to the point we fixed the engine mount and made it stiffer then it vibrated like a bastard, although the big end did shit itself a meting later so it may have already been on the way out
In the riders seat
I rode one of Brens, it was ok right up to the point we fixed the engine mount and made it stiffer then it vibrated like a bastard, although the big end did shit itself a meting later so it may have already been on the way out
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
Originally Posted by scracha
Forum whore
soft the lot of ya, i rode it in the BOB and it was sweet as! I wonder if its because the aluminium frame i run with soaks up more vibration then the hard steel frame?
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In the riders seat
Piss off, it had a different motor in it then, it vibrated enough to make my hands go numb at Raupuna
Did the first motor I used at Levels have a balance shaft in it?
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
Forum whore
It was the same motor u inbred goat. after u fucked it i stuck another rod kit in it.
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OK, so who's next?
Can't be that bad is it? We did this to my brothers XT250 years ago and he rode that all over the country....though it did make ya feet go to sleep after a while.....
Drew for Prime Minister!
www.oldskoolperformance.com
www.prospeedmc.com for parts ex U.S.A ( He's a Kiwi! )
In the riders seat
Maybe you put this one together properly then?
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
Forum whore
http://www.oldskoolperformance.com/
Cool pix especially the H2 pro street
Unknown Disorder
20 lap race at Mt Welly this afternoon and at the end my hands were buzzing. And that was without revving it as hard as I usually do.
Forum whore
10 laps into it I felt like that all over
"Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
“Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower
Unknown Disorder
Get a diesel then, much better
Forum whore
no way is it as much fun thow
Get a diesel then, much better
"Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
“Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower
Unknown Disorder
To be honest I think it probably is. Don't get me wrong I love two strokes but at the end of the day it's all about going out and riding around in circles and coming off the track with a huge smile on your face. I don't think it really matters what you ride as long as that's the end result, and if that isn't the case you should probably go and find another hobby.
Hardcore Biker
The crank is already balanced in a FXR. The vibration is from out of phase motion, hence the balance shaft is set out of phase with the crank and soaks up the motion.
That is why V twins are smooth. The 90 degrees between cylinders does the same thing as a balance shaft. (PS a Harley at 45 degrees does not work hence they vibrate your fillings out)
The vibration is caused when the piston slows down at the bottom or top of the stoke from its maximum speed 1/2 way down the bore. If you have a V twin, when one is at the bottom or top of the stoke the other is at maximum speed 1/2 way down the bore.
Th only -ve thing the balance shaft really does is add to rotational inerta which means is picks up revs a bit slower.
Bucket Racer/Crasher
I love the interweb.
There is of course that little problem with a single where the crankshaft is creating a force whose direction changes as the crank rotates. It's all good at "ONE" rpm when the force is equal and opposite to the force generated by the piston but even then only in line with the bore. At no time is there ever any force perpindicular to the bore that needs counteracting. The problem is that without something to counteract that force generated by the crank perpindicular to the bore, say by a second cylinder or a balance shaft, the vibration will only get worse as the revs rise. Because the forces are generated by a rotating mass it is a square law that determines the forces - double the revs=four times the force. It's complicated and simple at the same time. A single tries to counteract a reciprocating force with a rotating force. One force increases linearly and the other increases exponentially(?). Other factors affect "feel" as well. Different chassis construction, engine layout and other things. I could go on, and often do.
Long Haired Yobbo
So, Supermono = good?
Heinz Varieties
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