Hi

I have a lt50 which starts and idles fine, but when I rev it its not a immediate response it's gradual, and when I hold the rev on its kinda goes up and down.

Any ideas thanks

 

Clean the carb.
If that don't fix the surge, you need to look for a intake air leak or maybe crank seals.

 

Hi thanks for the reply

I already cleaned the carb but I will have another look, is there a way of telling if the seals were bad and what kind of job is it to replace? Thank u

 

Best to dbl check carbs, never know if something is floating around.
Surging is usually a air leak. Spray carb/brake cleaner around the intake.
I'd have to look at a fiche before I comment on the seal installation.

 

I'm going to check this shortly, I'm waiting on a compressing tester arriving, what should I expect this to be at? What's good and what's acceptable etc

May sound stupid but should it start first time without any choke on, could it be getting far too much fuel?

Cheers

 

Hopefully comp at 90+.
Yes, it could be getting too much fuel, another aspect of the carb cleaning (needle and seat area).

 

Just an update

Sourced the lack of revs,turned out it can never been de-restricted at the carb took out the restrictor and revs right up

Out of interest I done or tried to do a compression test, it went to 90 and slowly came down, should it hold at 90psi? I wasn't aware u are supposed to hold in the throttle while doing it, anyone able to tell me exactly what to do lo
Thank ul

 

Yes, WOT. I've not had it vary much and it's not going to have less. I'd say your comp is fine.
The comp came down because it was leaking by the check valve on the compression gauge.

 

Hi again is there a quick way if telling what year the LT50 is? It's the older yellow/blue I know where the VIN is etc just don't know how to read it

Thanks again

 

They are all the same.