FJ600 - Trouble starting.

I did not, but will give it a shot when the parts for the carbs arrive.

No i have the same thoughts, leaking shaft seals will make problems, but keeping a cylinder from running, i doubt it, i did spray the intake boot with carb cleaner without any effect.

 

Seems like about the best next step in the troubleshooting process. Thanks for being a good sport @RonniN .

 

Carbs ultrasonic cleaned, rebuilt, new throttle shaft seals, new o-rings, new screws for the butterfly valve, and plenty amounts of loctite to make sure the screws are staying in place.

Still need to bench sync them, and then reinstall on the motorcycle, i am hoping it will make 3 cylinders become 4.

And yes, Suzuki seals fit, and they are a lot cheaper than the Yamaha version, partnumber can be seen on the picture.

 

Good info. I guess if they're are both Mikunis there's no reason why not. Fingers crossed - this is intriguing

 

Come on Ronni - we're waiting!

 

Fowlers have these seals, anyone know if they are the same?

https://www.fowlersparts.co.uk/parts/4273175/-0/carburetor-model-h-e18?noredir=1

SEAL
13651-51011-000
Replaces 13651-51010-000
Share this part
IN STOCK
£2.74 inc. VAT

 

Yea me too, been pretty busy lately, but hoping i soon will get back to it.

I think they should fit, if you look on my picture its the same part number.

 

Yes good price for them too.

 

Back to working on the FJ.

Reinstalled the carbs, airbox, connected fuel, and turn the key - started right up, on 3 cylinders, did a bit of tweaking and 3 cylinders still, and noticed fuel dripping from the bottom of the carbs, shut down the motorcycle, and pulled the carbs - again.

Morale of the story, is when you rebuild your carbs, replace the friggin fuel inlet T.

The good news is i am pretty sure i found out why it runs on 3 cylinders, or 3.5, decided to check the bolts holding the intake boots on the head, and surprise the two on number 1 could be unscrewed with the fingers, the remaining 3 cylinders was good.

And no, i did not tear the gasket, it looked like that when i removed the intake boot.

 

You have some gasket paper? Or I think someone on here uses cereal boxes with good results...no kidding.

 

Works in a pinch, high density.

 

I got gasket paper, but the fuel connector is leaking, so i anyway need to order parts.

 

those fuel rail "T" pieces are a real pain, and rarely reseal when they have been removed, why they didnt put "O" rings on there i will never know , so i put some very thin section "O" rings on myself ,and pushed them in there with a thin blunt bit of plastic, and the seals hold fine, dont know the size or number of them just now, but could find out tomorrow if you like, as the "T" pieces are not cheap

 

Thank you for the reply, unfortunately i already ordered a new Fuel T, 30 Euro..

I will order one from china also, it comes with orings, so nice to have in stock for the future, and a lot cheaper than a Yamaha OEM part.

 

I don’t bother to reuse the original Mikuni ones. They are always worn out. I’ve only had ONE that was still good. I replace them with the brass ones with the double O-rings that LEN carries.

 

yeh, that would be a good plan, but postage and import costs would probably make them dearer than original ones

 

RonniN, do you have a link or something, to the T piece from china you are ordering, cant seem to find them on ebay

 

https://m.aliexpress.com/i/4001260500611.html

 

thanks RonniN, i ordered one last night, around £9 , GBP

 

I 'think' that as a makeshift solution I've wrapped with PTFE tape in the past to make a seal..