1994 SLT750 Carb Problem Or Not?

[Gabriel]

Ok here's my boggle had a problem with my machine last few times out, found out it was a bad reed valve in my intake, (thanks to these forums for the help), anyways I bought new boyesen reeds and replaced them with the Boyesen reeds, which are the best out there I here, the machine is much better with throttle response then before my problem started, but Why can I not get 6500rpm out of my machine in the water? My book says it should get 6500rpm at max throttle. My buddy has the same machine with the same motor as I do and his machine goes faster, not much but a little more top end then mine, the only thing I can think is his rpm, he gets 6200rpm at max throttle (in the water). Mine goes only 5300rpm at max. Why? Checked compression all the same and the even the same as his motor as mine dead on. Checked clearances for pump both the same. I was reading about the high-speed adjusters on my Mikuni carbs but mine looks like there is not an adjustment why? Would this help me get more rpm at max throttle? Someone anyone help please.

[warfare]

Re: 1994 SLT750 Carb Problem Or Not?

did you check to see if the throttle cable is opening the carb butterflies all the way?

[Gabriel]

Re: 1994 SLT750 Carb Problem Or Not?

Yup! thank you for your response! Looks like everyone here is stumped with this one, as i am too.

Gabe

[Gabriel]

Re: 1994 SLT750 Carb Problem Or Not?

Lots of peeps reading this but no help?? come on, have I stumped everone???
Gabriel

[Technical Support]

Re: 1994 SLT750 Carb Problem Or Not?

Yes your carbs have high speed screws. You have to remove the aitbox to see and adjust them. WIthout doing proper high speed plug chops (read the tech article) you don't know if your mixture is your problem or not.


Did this start suddenly? Did you have higher RPMs before, or did anything change like the impeller?

[Polaris_Nut#1]

Re: 1994 SLT750 Carb Problem Or Not?

Are you guys running the same Impeller? If so is there any damage to yours?small chips in the impeller or stator veins will scrub off some speed and rpm.

[Gabriel]

Re: 1994 SLT750 Carb Problem Or Not?

Thanks for your response! What is aitbox? the flame arestor cover? no my machine always did that since i bought it last year the impeller is in good shape clearences are fine, the only difference me and me friend have is mine is the 3 seater and his is the 2 seater but why am i not getting full rpm like he is? I changed my reeds which were cracked bad. I noticed on my carbs the high speed adjusters have a stop on them i think, only being able to turn them half way open or half way closed, is this normal? how can i turn them 360 if I want to and what is chop off?

Regards,Gabe

[hunters]

Re: 1994 SLT750 Carb Problem Or Not?

I beleive that he is talking about the airbox (flame arrestor).
Also you can pull the adjustment sleeve out and it will turn 360+ degrees.

[Gabriel]

Re: 1994 SLT750 Carb Problem Or Not?

Thanks Hunters for you reply! Should I adjust them? Did you here about my boggle?

Gabe

[Gabriel]

Re: 1994 SLT750 Carb Problem Or Not?

Can anyone tell me if i adjust the high speeds will get more topend? can i hurt the motor by making this adjustment?

[WATERCRAFTSERVICES]

Re: 1994 SLT750 Carb Problem Or Not?

First Of All Be Sure Your Highs And Lows Are Adjusted Correctly. Then Ride The Ski And Do A Plug Chop.sbt Has Tech Articles On Both Carb Adjustments And Procedures For The Plug Chop. It May Be That Your Carbs Are Out Of Adjustment. An Untuned High Speed Adjuster Will Cause Your Top End To Not Reach Full Rpm.