this is my combination ........and this thing rips both bottom end and top end....launches off the line well

2006 ltz50

wheels rotated and spacers on rear
duro tires rear 16x8-7 fronts 16x6.5-7 ....stock on predator 50, way better handling and traction
cylinder head shaved .015 ...intake port lightly ported
fmf exhaust
k&n filter with outerwear
main jet 80 pilot 22.5...vp race gas mr9, 87 octane, oxygenated
ltz90 cdi
nology plug wire
dr pulley 6 gram sliding weights 17x12
lightened rear clutch shoes 200 grams

 

I removed three rollers this evening, and then I put them right back in. The bike might launch just slightly better with them removed but it hit the rev limit at a very slow speed. I lost all the top end. Now I understand why everyone upgrades the ignition when they pull three rollers. Ours still has a very acceptable top speed with the 48 tooth sprocket and all six rollers. I'm keeping the clutch stock, and I'll mill the head when I get around to it. I'm just about satisfied with it.

Mods so far:

CT Racing Pipe
K&N filter with outer wear
75 main jet, 22.5 pilot
48 tooth sprocket - best money spent yet!

 

jp
nice work, i like the tire set-up instead of these balloon tires...
and the nology plug wire, did you change the plug also???

what is a "DR pulley 6 gram sliding weights 17x12 ????
and "lightened rear clucth shoes 200 grams".... ????

i have all six rollers in 5gram each from CT, what's all that other stuff??

I could go back and completely port the head valves, intake and exhaust ports you think it's worth it???

 

must have been dealing w/same idiots that KingQuad450 was working with awhile back .Just got back from another speed/cycle shop. Much better place little high on mach work $35.00 forhead shave $8.00 for gask. and 2 weeks to do. Guess they have some work backed up.80 main 22.5 pilot it is . Thanx JPLLTZ50

 

Is this happening to every one out there every time someone replys I get 14 or more hits to my mail box edc7002 posted and I got 45

 

<div class="FTQUOTE"><begin quote>Originally posted by: greasemonkey2660

Is this happening to every one out there every time someone replys I get 14 or more hits to my mail box edc7002 posted and I got 45</end quote></div>

Yes, it's very hard to miss.

 

same quad different problem even in a small water crossing this thing stalls anybody figured out a fix sillicon spray doesnt seem to help at all?

 

i dont mean to change the subject but i think quite a few of us are in the same boat my son is six already 4' 3" 60lbs im starting to think bout next year all i keep hearing is you need to spend 8k to even compete in the 90 class anybody got a brand or strategy to get round this child support got me on a budget but he has so much fun i want to keep him in it im considering something used next winter would be the buy time any ideas??

 

Hey JPL, are you running the Duro Knobby's?

 

how do you do the porting and valve adjustments after shaving the head or do I have to bring it in for that. Im trying to learn to do as much as i can on my own dont worry im not going to try the shaving. Do i have to buy a different gasket or just another stock one whats the torque specs on the head. I sure appreciate all the info