[hsoj300ex]

i have a 95 300ex with a performance cdi and i put a fmf megamax 2 exhaust on it i went from a 122 jet to a 125 i also removed the airbox lid and wraped the header pipe with that header wrap for cars and after about 10 min of riding i cant get my leg within a foot of the exhaust because of the heat i know it should be hot but not that hot i was told i was to lean because it also backfires a tiny bit when i let of the gas do i need to go up a jet size or could it be something else ?

 

[Billy250X]

Yeah it's lean.Try a 130 main and a 40 pilot.

 

[Fastas]

yeah definatly lean im running into the same prob

 

[hsoj300ex]

ok ill try uping (spellcheck?) to a 130 and ill change the pilot to a 40 thanks ill let you know how it goes

 

[Helmut]

Yep, too lean.

 

[1987_250x]

Yeah it's lean.Try a 130 main and a 40 pilot.

I tried that, backed the pilot out four turns (from all the way in...) And it still backfires when i let off the gas.

 

[Helmut]

Make sure your pipe isn't leaking where it bolts to the head. A leak there or a crack in the pipe will make them backfire or pop.

 

[1987_250x]

Make sure your pipe isn't leaking where it bolts to the head. A leak there or a crack in the pipe will make them backfire or pop.

There isn't one where it bolts, but about six inches out I spotted a small leak. I asked my dad if he could weld a small patch there, but he said after it breaks in it would probably go away

 

[Helmut]

Make sure your pipe isn't leaking where it bolts to the head. A leak there or a crack in the pipe will make them backfire or pop.

There isn't one where it bolts, but about six inches out I spotted a small leak. I asked my dad if he could weld a small patch there, but he said after it breaks in it would probably go away

I had a pipe crack in the bend where it comes out of the head and curves back around and it would backfire when I let off the gas or when the engine was holding it back down a hill, it would pop.

 

[Billy250X]

Yeah fix the leak.I just went through this with my 250.A small leak will make her pop.But you could also be a little rich.It will load the pipe up with fuel and cause it to explode as a compression would in the cylinder and it back fires.

 

[1987_250x]

Yeah fix the leak.I just went through this with my 250.A small leak will make her pop.But you could also be a little rich.It will load the pipe up with fuel and cause it to explode as a compression would in the cylinder and it back fires.

My plug is still white, but I just read in one thread today to change the spark plug after messing around with the carb. I'm still running the same plug...

 

[Billy250X]

I agree.Change the plug and see how it is.

 

[300ex power by monster]

umm my pie like that u cant get withen a foot of it when i run for about 10mins but i deal with it

 

[Redracer]

umm my pie like that u cant get withen a foot of it when i run for about 10mins but i deal with it

Maybe that's why your quad is blown up...

 

[TRX2fiveO]

it takes all of 10 min to put in a 8.00 part Jon. that will save you hundreds in the long run. Do it right, I can honestly say that, I learned from my mistake. learn from yours. buddy

 

[Billy250X]

Yeah I'd say it was lean all this time.Thats why it blew up.

 

[300ex power by monster]

no it was vary rich so we lean it out a little but my pip would burn though my pants if i touch it

 

[TRX2fiveO]

You had issues if it got that hot buddy. I have my pipe header wrapped it gets hot but I can touch it without it scorching me.

 

[Redracer]

My pipe is not wrapped and I can touch it with my gloves on.

 

[TRX2fiveO]

I definitely think that the monster had some issues if it got that hot. mine used to but I rejetted and that cured mine.