Bike running fast revs

declan

So new reeds installed carb boot looks to be installed right aswell as inlet manifold and the cable is loose and not binding snorkel is installed airbox is complete sounds like it’s running crazy lean but I’ve done nothing to cause this any ideas while I have a break?

Calum

Air Leak

declan

@calum just checked and no bud I’m stumped everything is as it should be

declan

@calum the idle scre has no effect I really think the revs stuck on but I don’t see how it’s possible since I have slack and smooth running cable

Zrako

Do you have a nice play on throttle? Check the rubber if it sits nicely on filter housing.

declan

@zrako yes it all seems sweet

declan

@declan carb has been sealed so not debris can get in it

declan

@calum the cable has come out the carb again why has it done this again?

Calum

@declan Dunno mate. Have a look

declan

@calum no idea why it was out it’s back in again do you have any tips to fit the carb rubber to the air box as I have a right shit time struggling to do it

Calum

@declan Oh dear.

Yes, take the air filter out.

Work from inside of the box outwards.

Use a soft spudger (dull flat edge NOT A SCREW DRIVER!!!!!) to prise the angle of it into the box.

Once you learn how to do it, it's easy.

Do not force it in. It will go in without hesitation once you have that technique down

declan

@calum I’ve done it twice now and I hate it lol

Calum

@declan Technique my boy! It's all in the technique.

declan

@calum lol got it in pretty easy but it’s still revving to the moon no air leaks cable is 100% free safe to say I’m pretty clue less and pissed off

Calum

@declan If it was working fine before hand, then it's going to be something properly simple. Rushing isn't going to fix the problem.

My guess is that it's an air leak, because this is the most common type of problem.

The inlet manifold gasket should be renewed. As said previously, these are prone to failure upon renewal.

You said your inlet had a split in it, have you replaced the inlet? Sounds like it's past its best and I would renew it with a new one whilsy Yamaha still make them...

declan

@calum your right it just has to be an air leak there’s no other explanation so if I use wd40 should I be looking for bubbles as rpm change will not be reliable

Calum

@declan The added WD-40 should be combustable, bringing the mixture down so the idle should drop.

It'll be something simple. It might be that the reeds are installed incorrectly. Too Much overlap at the end etc...

declan

@calum checked before install they were a perfect fit and actuall were the same ones that were already in there

declan

@declan should there be a gasket between the engine and the reed block spacer

oldman

Yes