Another 3XV project

[bulldogboy]

You mentioned you may clean your tank out with citric acid? If so did you thoughrouhly rinse it? I found it to leave a sticky residue, I rinsed it to oblivion to ensure no residue left behind before swishing with premix.

[thump566]

Update. Discovered after the initial shake-down run that the speedo wasn't working and the left hand pot still is off song. Didn't get another chance to investigate until yesterday when the carb in question looked like this 

Tickover is lumpy on that cylinder and only clears once above 3500-4000 rpm, I dropped both float bowls but found little dirt at all. Next step is to revisit the suggestions received previously regarding idle/mixture setup but wanted to ensure the carbs were clear and inlet rubbers didn't have any issues. Stupid question, apologies, where is the idle jet situated in the carb? Is it above the float spring mechanism or elsewhere?

It was suggested that running the bike on the road should clear any carb issues but in reality cant see that happening so further investigation is needed before I lose the plot and swap it for a CG125 or similar     

P.S. Th pics are from the r/h upper carb which was seemingly running ok compared to the other one!

It might just be the picture quality but that fuel looks like sewage.

LOL. Nice one Phil, or watered down Diet Coke?

[Steveog]

I’m liking Bulldog’s idea. This might be discoloration from reside left by cleaning the tank. No particles. Just color tint. 

Phil should rehearse a “stand-up” act for clubs frequented by 2T bikers.

Steve

[thump566]

I’m liking Bulldog’s idea. This might be discoloration from reside left by cleaning the tank. No particles. Just color tint. 

Phil should rehearse a “stand-up” act for clubs frequented by 2T bikers.

Steve

The tank cleaning was actually the plan for my spare tank, this one only had minor pitting inside so merely added an in-line filter to the fuel tank to carbs pipe which is not showing any signs of dirt or debris. Will remove the carbs again this weekend and drain / replenish tank with fresh fuel to see if that makes any difference to the 'sewage'. 

[thump566]

Next challenge.... 2nd shakedown test, turned on the lights a couple of miles from home, first stop junction I encountered the engine died, fired up ok but repeated at every subsequent stop and ran VERY lumpy. Guessing the battery wasn't charging so need to check no erroneous wiring issues otherwise the charging system may well be faulty. Possibly the lumpy running already encountered on one pot could be electrical and not fuelling as previously thought.

[Warwick]

The wiring block connector and the earth connection at the reg/rect unit can sometimes suffer from corrosion or a poor connection so that's generally my first suspicion for charging issues.

Might be worth a look?

[bulldogboy]

Did you find out why you had "sewage" ( phils quote)  in your carbs?

[thump566]

The wiring block connector and the earth connection at the reg/rect unit can sometimes suffer from corrosion or a poor connection so that's generally my first suspicion for charging issues.

Might be worth a look?

Cheers Warwick, will be on that tomorrow.

[thump566]

Did you find out why you had "sewage" ( phils quote)  in your carbs?

Not yet, work interrupted progress recently. Hoping to resolve that soon though 

[thump566]

After tweaking carbs yet again, took a short local ride at the weekend. Still ticking over too high, nearly there hopefully but pulling well afer rebuild 

ps Not fitted fairing lowers yet in order to be able to view any potential issues during shakedown runs.

[bulldogboy]

My bike was ticking over too high , carbs are off at the moment , hopeing a good clean sorts it.I also found a split fuel hose on the top left carb, wondering if that had any bearing on the over revving,

[SouthCoastRich]

My bike was ticking over too high , carbs are off at the moment , hopeing a good clean sorts it.I also found a split fuel hose on the top left carb, wondering if that had any bearing on the over revving,

That would seem a culprit for balance and lack of stable idle. I'd be tempted to change the fuel hose and test again - changing one thing at a time. BUT ... I'm sure others on here are more knowledgable than me!

[bulldogboy]

lol, im a way behind you in the que of the knowledgeable, ive replaced the hose, the carbs are with my mate whos got an expensive ultrasonic bath, ive had 2 years of hassle free running before this erratic idling, was sitting at 4000 on "tick over", and ran slightly rough, a good thrashing didn't improve the running, so off they came,a good clean certainly wont hurt, sorry Ron didn't mean to hijack your thread

[thump566]

No worries.

A problem shared is often a problem halved 

[thump566]

Wasn't sure which looked better once I mounted the lower fairings.

The red mudguard came with the Chinese bodywork set and the black OEM one from eBay (needed a minor repair and then respray from orange to black).... a 3XV is an ongoing maintenance / modification process 

Any preferences anyone?