The rear cylinder has stopped working?

Checked for spark - Good

The only way I can get the rear to run is to completely remove the pilot screw.

I stripped and cleaned the carb down but no difference.

Any ideas?

Cheers

Gary

got to be fuel, is there a smell of petrol in the bore?

I know you said you cleaned it, but did you strip down the carb into parts and use an ultrasonic cleaner? this is the best way to ensure its clean. I hope you checked fuel flow first.

drewps

Definately fuel getting through. It's as if there is a lack of air. With the pilot screw removed it fires with fuel dripping out of the hole but if I block it with my finger it dies?????

Cheers

Gary

maybe a blocked pilot air inlet?

Cheers Drewpy

Next port of call.

Gary

Had the carbs off today and checked all the jets and jet ways. All clear?

Still not running on rear cylinder.

Got good spark and compresion?

Any help/ pointers/ where to check next greatly appreciated.

Cheers

Gary

did you take the all jets out and use carb cleaner?

did you take the all jets out and use carb cleaner?

Yes. Sprayed down through each channel individually, all clear.

However, tried again this morning and it has sprung an oil leak from somewhere at the rear???? Fine spray of engine oil that I will investigate over the next couple of days. I'm now thinking compression as a factor. Need to find the leak before I go any further.

I'll keep you posted.

Cheers

Gary

OK!

Cleaned carbs again, no joy. Sent to be ultrasonic cleaned, still no joy. Got a second hand set from ebay (XV1000) put them on, fired her up. Both cylinders popping away nicely and just to make sure burnt my finger on the exhaust.

A bit of tuning this weekend and get the correct jets in.

Not given up on the old carbs though. I'm determined to find out what the problem was.

Thanks for the advice.

Gary