[Shep]

Ignore reference to Electronic Tacho.Not needed.



HTH

 

[Shep]

Is there a chance that the choke plates are sticking on?



Seems weird to soot up so fast.If this were a CDI engine I'd say next step renew coils.You could also try Iridium plugs.Much more robust and forgiving.



http://cgi.ebay.com/ebaymotors/NGK-...0480069QQptZMotorcyclesQ5fPartsQ5fAccessories

 

[Shep]

Just to add.A spare set of carbs I serviced had both sticky Throttle butterflies and choke plates.The alloy corrosion of being left unused had caused the small holes where their axles meet the bodies inside the intakes stopped them operating correctly.I worked them loose using Rust release and operating them for several minutes and then cleaning with Carb/Brake cleaner.I also of course full cleaned and lubricated the linkages.This is best done with the carbs off the bike so I suggest a full carb service.

Full section covering carbs here,



http://globalcxglvtwins.hostingdelivered.com/viewforum.php?f=19&sid=71e7ada04eaafc68d774121e90691875

 

[Shep]

Shep, I went through carb sections after following your link, and I realized that I didn't remove the black banana cover and clean down the air jets. I'm not sure how these might affect the lean/rich mixture, but I'm going to clean them and see what happens.

They are,"The" most problematic area of the carbs IMHO.They are the tiny venturi part of the low speed idle circuit.If not cleaned properly will cause all sorts of problems.The Carb pistons/slides are,as you correctly assume,raised by the partial vacuum created at the intakes of the carbs.

I use copious amounts of rust release down them,then carb-brake cleaner and whilst doing so also poke a thin guitar string down them.Then high pressure air blow them through.

On refitting carbs the most common problems are not re-checking and setting the float heights and introducing new faults via carb boot air leaks.



Note:I never poke any metal implement down soft brass main jets.