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Post your Pics! / (Updated) Mod XR Mower Pics
« on: June 03, 2015, 05:24:36 pm »
Tell me what you think, improved since last photo? Anything to work on, that you see could be better?
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I guess I am going to run 5 on the jack shaft so the pulleys won't be the same size on the jack shaft
And transaxle
That track carries a lot of speed thru the corners, plus you don't weigh much,i would stop trying to overthink this and try what you have!
Final ratio =4.7999999 -------in short 4.80
Where did you race?
Throw away your "Top Speed" factoring. That's what is getting you into trouble. Rarely on any track will you ever hit your top speed. Look at your figures, then look at the times on the Nationals race results. Your best bet is to have a final drive ratio (that's all your pulleys and sprockets factored together) at or near 5.0:1 and adjust from there. GP gearing is a delicate balance of torque and chassis dynamics. You can have the correct gearing, but lose forward momentum if handling is poor.
Where do you find you're at your slowest? On exit of the turns?
To find your true final out put ratio take and put a make on the flywheel then put one on the side of your tire while the rears off the ground put in the gear your plan on racing in mine is 3rd turn the flywheel by hand and count how many turns of the flywheel to 1 full turn of the tire my GP is around 5.5 to 1
Looks good!! I do agree about the wheels though...been there done that!!
What gear are you using in the transmission?
36mph sounds real fast for GP - modxr!
They will still break.
Are those bushings or bearings in those seel front wheels. If you plan on running at mx207 I would change them to aluminum wheels and some good hubs. Mx207 is not a very forgiving track as it has tight banked turns.
Also i think it would of looked better if you used the hole hood!
Awesome, man good job