Fuelling problem

[Hilko]

Hi everyone. New to the forum and am looking for advice. Just rebuilt a gsx1100et and having problems with fuelling. Float bowls in Carbs 1 and 4 were completely dry after turning the engine over for a while so checked fuel being sucked from tank and ok. Removed carbs and poured petrol in through intake tube all carbs filled ok. Put carbs back on bike and runs only on 2 and 4. Spark is ok on all 4 but seems to be no fuel getting to 1 and 4?

Any ideas. 

[gsx1100e]

Welcome  to OSS, and pictures we like them....

Did you check needle valves? 

[Hilko]

All jets incl needles etc have been renewed. The bike did run ok a few weeks ago but just came back after holiday and tried to start with result mentioned earlier. 

[gs7_11]

Sounds like your tap isn't opening fully. If all the carbs fill ok when you pour petrol down a pipe, must be the tap.

[Hilko]

Never thought of that. I assumed that as fuel was coming through it was ok. I’ll check it next time. Cheers. 

[Fazz711]

Hi bud. Welcome to OSS 

[Hilko]

Been away for a while but just checked the fuel tap as suggested by gs7-11 and sure enough the rubber diaphragm was knackered. Replaced it and checked everything else again and running sweet as a nut! Thanks for the help, much appreciated. 

[gs7_11]

On 11/7/2018 at 8:36 PM, Hilko said:

Been away for a while but just checked the fuel tap as suggested by gs7-11 and sure enough the rubber diaphragm was knackered. Replaced it and checked everything else again and running sweet as a nut! Thanks for the help, much appreciated. 

Cool! Glad it's sorted.