Pw80 MODS 2001

[delt1ks]

I did some reading on the internet and discovered a few Mods for the PW80.

Hence, with the wrench in hand I did the simply stuff.

I removed the spark arrestor and replaced the cap back on the muffler.

Then I cleaned the carb and moved the needle clip from the third position up one notch.

I also removed the stock air filter snorkel from the air box.

This made a huge difference on the peppiness of the bike. My son, “seven” is loving it and it sounds so much better. No longer reaching rev limit in first gear.

Second and third is still a little non responsive with a 180LB rider on it or more.

Then again that’s asking a lot of the little bike. My son does not switch gears at this

point. I way 250LBS and it pulls me in all three gears. First gear, the chain skips teeth

on the rear sprocket. Both rear and front sprockets need changed.

I want to fully utilize second and third gear on this bike so what setup should I go with?

90% of the time my seven year old will be riding it.

[kdscoates]

if your 7 year old weighs 180lbs you should get rid of the bike and start throwing the football!!!

[delt1ks]

HA HA. no..that was my cousin riding it. He's about 45LBS

[Spacelord]

I may be wrong (probably am) but don't some of these have an orifice in the header gasket ? If it does it could'nt hurt to try it without the orifice. can't help on the sprockets.

[DirtDabber]

Not sure what the stock sizes are but typically on a 15T front and a 45T rear you can drop one tooth on the front or increase three teeth on the rear and have the same result. If you increase the rear you will need a longer chain.

Dropping the front a tooth will give a little more pep on the low end and may give it the feel of more guts in the upper range as well. I would lean toward dropping one in the front and increasing 3 on the rear. If you want more top end later as he gets older you can then go to a stock front sprocket for little money and use the same chain since it will have stretched a little anyways. This is better than dropping two in the front since the chain is rolling around a larger sprocket....in theory anyways....

[delt1ks]

I'm sure there should be some type of gasket between the header and the head pipe but nothing on this one. If it was there before, It was worn out. I read there was a block plate in this location but I did not see anything that resemble a block plate on the header.

Thanks for the sprocket ranges. My boy Hunter wants a new bike for Christmas so I'm spicing this one up with newbies as I can't afford a new one. He still has loads of learning before he's ready for a clutch system.