300/440/550 1989 650sx bogging down off the start.

[kawasakisxs0ul]

The problem: My 89 650sx is awsome, BUT, it starts fine, but when i start to go it boggs down, has no power and slooowwwllly accelerates, but rpms stay near the same no matter how much gas it gets. then all the sudden at a certain point it gets fast, and rpms work and the ski rocks. I can even stop it for a quick stop or what ever and go again fast. but if i let it sit too long, turn it off, or sub it, it becomes bogged down all over again and i have to go through the waiting game (apprx. 30-60 second) untill it warms up, kicks in, or stops being unresponcive. GOT ANY IDEAS GUYS?:sad2:

 

[Jawbreaker]

I would start with replacing your gas and oil... It sounds like it could have water in the gas. If that doesn't work, rebuild and clean the carbs. If you haven't ever done it before, watch someone so you can learn how... It's really easy...:fing02:

 

[Maxumflux]

like jaw breaker said more than likely its bad gas.

also make sure gas is pulling from the tank and staying in the fuel lines

 

[kawasakisxs0ul]

okay im going to clean the carb right now, but how do i check if fuel is stayiing in the lines??

 

[kawasakisxs0ul]

i just took off the carb and its allready clean... so that cant be it.

 

[Maxumflux]

i use clear fuel lines. you may also have an air leak going into your high or low speed jet. make sure you are using proper methods of securing these lines. don't be lazy, use a clamp.

my fuel llines are clear going in there to. i didn't have a clamp and got the same result your getting. try that..

 

[kawasakisxs0ul]

which lines are the high or low speed jet ones? i clamped a few loose lines, but i dont know which r whicH

 

[Cliff]

your one way valve may be bad. its attached to one of the hoses coming off the tank

 

[kawasakisxs0ul]

your one way valve may be bad. its attached to one of the hoses coming off the tank

how do i check?

 

[Cliff]

can only blow through one way

 

[kawasakisxs0ul]

okay sweet, ill pull the valve off, hope i can find it

 

[JLight]

Sorry to jump in here. I'm building a 650 SX. Do I need to use one way valves in the fuel lines or can I just go without?

 

[Cliff]

you need one. they help build pressure in the tank for good fuel pressure or something along them lines. none of my skis run good without them

 

[kawasakisxs0ul]

i wish i lived near surf.. ahh! im so sick of waiting to ride.

 

[Mark Gomez]

check compression

 

[kawasakisxs0ul]

check compression

kk

 

[kawasakisxs0ul]

i zip tied all fuel hoses tight to their fitings, checked the one way valve- its fine... cleaned the carb, put new gas in.. checked for cracks in line. (havent checked to see if fuel is going throught the lines well. or checked compression.) How do i check compression?

 

[Crab]

Biggest problem with the tiny stock 28mm carb is the low speed jet cloggs real easy. Pull it out and make certain its clear, and check the filters.

 

[kawasakisxs0ul]

Biggest problem with the tiny stock 28mm carb is the low speed jet cloggs real easy. Pull it out and make certain its clear, and check the filters.

where is the low speed jet? and where are the filter, lol im so new to skis.... sorry for the questions.

 

[Crab]

If it has the external fuel pump, make sure it works and the pulse line is good.