Better top end?

[03yamwarrior]

Hey guys just looking to see what I can do for better top end? Seems to fall off in the top of 5th and all of sixth.. don't really want to bore it out or any major motor work. All of this will be done over time. Thanks!

 

[sparkymichigan]

What do you mean "falls off"?
Does it not have enough power to pull in those gears? If so go one tooth smaller on the front sprocket.
If its is "falling off" in all gears, at the 3/4 and up throttle, then maybe your jetting could use some work.
Kind of an opened question, but we will surely help.

 

[03yamwarrior]

It feels like once I get in the higher rpms it's almost like it looses power. If that helps. Sorry about the open question

 

[lbjamm]

I'd say main jet

 

[sparkymichigan]

^2
Check you air filter too

 

[03yamwarrior]

I just rebuilt the carb haven't got to run WOT yet. Did the pen spring and valve cap mod and running no airbox cover. K&N with outerwears. Stock jets. Think the jets are the problem? Would have run WOT today but snapped the clutch cable 5 miles from home. Had to run back in 1st.

 

[buzzy613]

there's your problem your running to lean bump to a 147.5 or if your going to pipe it put a 150 in it

 

[03yamwarrior]

Thanks! I'll try that! Any upgrades you guys think I should do for Niger top speed?

 

[03yamwarrior]

Higher*

 

[buzzy613]

well niger speed is really fast lol, if you want faster go with a 14 tooth front sprocket, you will loose bottom end pull but top end youll gain 3 mile an hour. which is a bunch of top end

 

[03yamwarrior]

Alright thanks!

 

[buzzy613]

also slap a pipe on the bitch sounds good lets it breath and more pah, and learn how to hold it to the max shift points

 

[03yamwarrior]

That's what I'll be getting next. And how much did lightening that flywheel set you back? How much of an increase noticed?

 

[buzzy613]

$80 4 ounces and yeah it revs out higher and a little quicker

 

[90_warrior]

$80 4 ounces and yeah it revs out higher and a little quicker

did you buy a new fly wheel? or take it in to a machine shop?

 

[buzzy613]

the only way to lighten it is to take it to a shop I haven't had a problem there are some guys that don't like it because it pulls more top then bottom and trolling through trails is alittle sketchy

 

[03yamwarrior]

Alright I'll look into that to. I run a lot of trails but oh well.

 

[buzzy613]

just leave it alone then it take the bottom trolling out of the motor

 

[03yamwarrior]

Could I adjust the air/fuel mixture screw for now untill I get a jet? What way do I turn it