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Chassis question |
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ALO 
Senior Member 
Joined: 13 July 2004 Location: Canada Online Status: Online Posts: 1075 |
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 Topic: Chassis questionPosted: 01 June 2008 at 2:58am |
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My bike launches straight but when it puts the wheel down in 3rd gear it tends to lean over to the right a bit. The run is straight and I don't have to correct direction or anything then it straightens back up in about the top of 4th gear. Not sure what to do about this. It's a turbo 10" tire bike runing 8.10's to 8.20's
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xlmod
Groupie 
Joined: 30 August 2005 Location: United States Online Status: Offline Posts: 34 |
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Posted: 01 June 2008 at 1:25pm |
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Pup has articles on this site that explain chassis set up and tracking. Not sure where they are in here maybe someone can guide you to it.
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ALO
Senior Member
Joined: 13 July 2004 Location: Canada Online Status: Online Posts: 1075 |
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Posted: 01 June 2008 at 1:41pm |
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I went to his website and will try a couple things I read there. Good information.
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Kawi1500Vortex2
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Joined: 17 March 2004 Location: Mississippi Online Status: Offline Posts: 6212 |
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Posted: 01 June 2008 at 2:20pm |
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how far could it be 'leaning over' if you dont have to correct? you aint gonna like this but sounds like a rider issue more than chassis are your bars level or staggered? if everything is straight and set correctly the bike dont know if the tire is in the air or not remember when i moved my rear rim over to the right for chain clearance? and it was already a little right to begin with? everyone freaked out and said the bike wouldnt go straight like that? it goes straight as a arrow |
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PM720
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Joined: 18 November 2003 Location: United States Online Status: Offline Posts: 1776 |
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Posted: 01 June 2008 at 4:16pm |
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How much do you cock the wheel? Scott |
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Kawi1500Vortex2
Senior Member
Joined: 17 March 2004 Location: Mississippi Online Status: Offline Posts: 6212 |
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Posted: 01 June 2008 at 4:32pm |
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zero measured with calipers .000" |
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Kawi1500Vortex2
Senior Member
Joined: 17 March 2004 Location: Mississippi Online Status: Offline Posts: 6212 |
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Posted: 01 June 2008 at 4:32pm |
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ps - "just ride it"
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PM720
Senior Member
Joined: 18 November 2003 Location: United States Online Status: Offline Posts: 1776 |
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Posted: 01 June 2008 at 6:06pm |
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I asked because when we went to the 11" tire we had to move the wheel 1/2" to the right. Everything was cool until 3rd gear when it put the front wheel down and made a left turn! Scott |
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Kawi1500Vortex2
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Joined: 17 March 2004 Location: Mississippi Online Status: Offline Posts: 6212 |
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Posted: 01 June 2008 at 7:22pm |
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well i guess mine aint got enough hp to know the diff? first couple of passes it seemed to go right when it was on the bar so i went down .5 turn right and up .5 turn left then it went straight when i changed the tire last time i made em even again and it went straight so i figure it was the tire making it pull not the wheel or where it is in relation to the center of the bike |
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riceburner
Senior Member
Joined: 18 November 2003 Location: United States Online Status: Offline Posts: 2021 |
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Posted: 01 June 2008 at 10:29pm |
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how old is the tire?
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Kawi1500Vortex2
Senior Member
Joined: 17 March 2004 Location: Mississippi Online Status: Offline Posts: 6212 |
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Posted: 01 June 2008 at 11:23pm |
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mine wasnt 8 months old (according to the date) had been on the bike for a couple of months but it had a lot of passes on it like 50 i dont run screws and think that one side may have twisted more than the other i didnt measure roll out side to side but wish i had to confirm this have you tried that alo? *(measuring 'roll out' side to side) Edited by Kawi1500Vortex2 - 01 June 2008 at 11:24pm |
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ALO
Senior Member
Joined: 13 July 2004 Location: Canada Online Status: Online Posts: 1075 |
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Posted: 02 June 2008 at 12:28am |
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riceburner
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Joined: 18 November 2003 Location: United States Online Status: Offline Posts: 2021 |
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Posted: 02 June 2008 at 12:35am |
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Sidewalls breakdown after a while, dont run them too long, or it could be spinning.
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PM720
Senior Member
Joined: 18 November 2003 Location: United States Online Status: Offline Posts: 1776 |
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Posted: 02 June 2008 at 1:51am |
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Link to video? Scott |
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ALO
Senior Member
Joined: 13 July 2004 Location: Canada Online Status: Online Posts: 1075 |
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Posted: 02 June 2008 at 8:40pm |
http://videos.streetfire.net/video/2008-Lordco-BC-Nationals_ 163695.htm |
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riceburner
Senior Member
Joined: 18 November 2003 Location: United States Online Status: Offline Posts: 2021 |
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Posted: 02 June 2008 at 8:57pm |
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I think you were lined up to the center (or the bike ran to the center on the hit), you over corrected it by pulling it to the left, then you had to pull it back over to the right, this is where it seems to lean over. Overall (from the view I had) it all starts with getting lined up str8, or pointing the bike so it goes str8. Great job of riding. I am sure there will be other opinions. s.r. |
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ALO
Senior Member
Joined: 13 July 2004 Location: Canada Online Status: Online Posts: 1075 |
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Posted: 02 June 2008 at 9:18pm |
I bailed on the run too, bracket racing the finish line. |
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Kawi1500Vortex2
Senior Member
Joined: 17 March 2004 Location: Mississippi Online Status: Offline Posts: 6212 |
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Posted: 03 June 2008 at 1:05pm |
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looked to me that the bike was lined up perfectly straight and went perfectly straight until 3rd gear just like he said bet if you take that all kill out and put a 1-2-3 in it that doesnt happen anymore or just ride it? you said you didnt have to correct but you can clearly see in the vid that you did it was carrying the wheel all thru 2nd - maybe you have the bars cocked when you shifted 3rd? either that or the track is not level after 330' did you check that?
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riceburner
Senior Member
Joined: 18 November 2003 Location: United States Online Status: Offline Posts: 2021 |
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Posted: 03 June 2008 at 3:08pm |
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How can you tell if the bike was lined up perfectly straight when the camera angle was not directly behind the bike? Watching the front wheel and wheelie bars I would bet that if he hadnt corrected, (visible by the left side bar being driven on) that he would of been in the other lane before the 1/8th mile cone. Correct me if I'm worng. s.r.
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Kawi1500Vortex2
Senior Member
Joined: 17 March 2004 Location: Mississippi Online Status: Offline Posts: 6212 |
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Posted: 03 June 2008 at 3:44pm |
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cuz it went straight in first and second with dude sitting dead center look at the groove he is just as far from right side of right groove 220' into run as he was when it left lemme look again |
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Not quite that bad but it definately pulled HARD to the left. I think we put .090 in 1 side and it ran on a string again. 