4,5,6 gear bogg

[foxrider603]

Runs perfect through 1-3 but anything higher seems to bogg, it gains power but slowly. Also doesbt sound like my right cylinder is firing all the time at high rpms. Im completely stock other then fmf exhaust. Running 290 mains an 27.5 pilots. 500 ft above sea level

[dave5.0]

Is everything clean?

[foxrider603]

Should be i cleaned the carbs when i rejetted for cold weather a few weeks ago

[sheerider11]

Usually to rich if the bike falls on its face under a higher load like that. What so the plugs look like?

[foxrider603]

Chocolate coler. But the plugs are about 6 months old. The only thing i xan think of is before i went for my ride i took my air/fuel screw from 1 and a half turns out to 2 an a half turns out

[dave5.0]

I just posted this in another guys thread with similar issues.

 

 

 

 

I just jetted one here while back with pipes and reeds. Ended up with a 30 pilot. If you have the screw all the way in it wants more fuel. That 25 is a stock jet. Probably gonna end up 1-2 sizes bigger atleast. I usually adjust a pilot by idle speed. If you have the right pilots in there you should be able to set an idle, then adjust the screws evenly 1/4 turn or so at a time until you get the highest idle. If you go in more than I think 1-1/2 a turn pilot is prob too small. If you go more than 2 1/2-3 out its prob too big.

 

Once you get that ironed out move to the needle. Go all the way to the bottom with the clip on the needle. If its the right needle and the pilot is right it should idle fine and then stumble when you rev it. So come up the needle one clip position at a time until it clears out. Once that's clean put some big ass mains in it. Maybe 330-40. Hopefully it'll stumble on the top end. If so its big enough. Then come down one size at a time until it clears out on top. Once there run it through the gears to 5-6th. While wide open kill it and pull the clutch at the same time. Then Look at your plugs. Ideal is gonna be chocolate brown. This way isn't the most horsepower per say but it should run good and be safe. The motor will last this way. You can make more power possibly being on the edge of lean but I'm gonna assume you're just riding it like most of us are. The way I lined you out is a way to keep it going for a while and you won't have to worry if its gonna grenade because its too lean. I've never done any plug chops like a bunch of guys are gonna tell you to do. I haven't melted one down in a long time. Plug chops seem like a waste of a new plug to me. Especially of you aren't chasing any records.

[foxrider603]

Im not running stock pilot, im at 27.5 right now. As it sits my bike seems to idle fine

[dave5.0]

Did you read past the first 3 sentences?

[foxrider603]

Thanks for the advice. Ill have to order a jet kit

[sleeper06]

What your air box situation lid / no lid filter

[foxrider603]

Foam filter with lid an snorkel

[dave5.0]

Well shit, there's half your problem. Ditch that lid. Or at least ditch the snorkel and cut some holes in the lid. If ya have a pro design filter plate ditch the lid.

[foxrider603]

Ill try that out tomorrow