Video of son's 2003 LT50A after mods
 

List of mods:

No spark arrestor or tail pipe cap
No intake or exhaust restrictors
Ported intake
Ground carb slide,
70 main jet
Needle clip in 2nd to top position
Drilled air box
Lighten clutch weights
Head milled .030"

He can climb some good hills now [img]i/expressions/face-icon-small-smile.gif[/img]

Please right-click and save-as:
http://www.badassnovas.com/vid...5_13_2_07_Hayden_3.wmv

Video of son's 2003 LT50A after mods
 

iv done every thing to my 2005 that u list plus some , except u say u lighten ur clutch weights? how can you please explain.thanks

Video of son's 2003 LT50A after mods
 

<div class="FTQUOTE"><begin quote>Originally posted by: crazy450r

iv done every thing to my 2005 that u list plus some , except u say u lighten ur clutch weights? how can you please explain.thanks</end quote></div>

I removed the clutch and pulled the weights off. Clamped the weights into a vice and started drilling some material out (didn't go whole way through though) Drilled about 5-6 dimples on each side of each weight using a 1/4" drill bit. The more material you remove, the higher the stall will be.

Video of son's 2003 LT50A after mods
 

Cool video I remember when my kids used to ride like that. Now they want to take Dads bikes out and race anybody and everybody. Sure brought back alot of memories.
When the front shieve is fully compressed does the belt ride up on the front pully to the point where the back of the belt is even with the top or protruding 1/8 of an inch if not on alot of auto bikes you can mill off a little of the center of the shieves on both sides allowing them to come closer together and the belt will ride higher on the front shieve resulting in more top end speed and it won't affect bottom end torque at all not sure with the mini's but that is how they are getting more top end speed on the Rhino's. Hope this helps.

Video of son's 2003 LT50A after mods
 

The LT50s don't have a tranmission or CVT setup. Just a clutch.

Video of son's 2003 LT50A after mods
 

thanks for the info, iv got some polairis preditor90 clutch springs on the way right now. i hear there stronger? if they dont work ,or as well as i would like, im going to try this dilling method.

Video of son's 2003 LT50A after mods
 

by the way if you were to do it again would you drill more /less or are ya happy where its at . what kinda gain did you see , i know your stall is higher but hows the bike respond? front wheels pop of ground, rear tiers throw sand/gravel with a 65lb kid. its only a 50cc i know this and it isent a light bike as fare as h.p. to lbs go but i dont want this thing to come over backwords starting on a steep graid. thank you for all your help. rob.....

Video of son's 2003 LT50A after mods
 

<div class="FTQUOTE"><begin quote>Originally posted by: crazy450r

by the way if you were to do it again would you drill more /less or are ya happy where its at . what kinda gain did you see , i know your stall is higher but hows the bike respond? front wheels pop of ground, rear tiers throw sand/gravel with a 65lb kid. its only a 50cc i know this and it isent a light bike as fare as h.p. to lbs go but i dont want this thing to come over backwords starting on a steep graid. thank you for all your help. rob.....</end quote></div>

No, could never pull the wheels. It just helps him get off the line quicker. He's able to do some good donuts now [img]i/expressions/face-icon-small-smile.gif[/img]

I tried to find springs, but couldn't find anything this small that are the correct length and heavier than what's in there.

Video of son's 2003 LT50A after mods
 

&gt;&gt;He can climb some good hills now&lt;&lt;

My son's 2002 LT-A50 has all but its exhaust restrictors still in place, and the throttle screw tightened down quite a bit (~12 MPH max on level ground), but he rides like that video every time he's on it. Hill climbs like the one in the video are everyday events. He can't spin doughnuts except on slick winter roads, but everything else looks just like your video.

I'm not knocking what you've done, I'm just surprised that it took that much work to get that kind of performance out of your machine. I'm also wondering what will happen when I start opening up OUR little quad. I've backed off the throttle screw when servicing the machine and the untapped power in that engine is amazing. And that's not even touching the intake restrictor, the common carb adjustments, etc.

Are you saying that the stock (pre-mods) machine wouldn't do everything in the video?

Video of son's 2003 LT50A after mods
 

<div class="FTQUOTE"><begin quote>Originally posted by: WAATVAre you saying that the stock (pre-mods) machine wouldn't do everything in the video?</end quote></div>

No, he could do all of the climbing before the mods (sans the restrictors). He just gets up to speed MUCH quicker now.