Kinroad XT50QT-5 Stops and Crawls...

[makem]

Hi and greetings from Sweden!

I have a Kinroad XT50QT-5, made in 2004. 50 cc, 2 kW.

As most Kinroad owners(?) i also have had several problems with my moped, previously i took it to the dealer and had it serviced, but they went out of business because of all the service claims against them :)

Previously this year the moped ran without a glitch, everything had been serviced or replaced on it (completly new engine). But now i have problems with it again ;(

When i start it it is a little slow to start but once i get it started it runs fine, but after 30 minutes of driving it the engine gives up and just shut of. When i restart it the engine works but sounds kinda wierd. Also it will not run much more than a crawl back home.

If i leave it for a couple of minutes it will work fine again, wich puzzles me a bit, i had a guy over to check it but he couldnt find anything wrong. He concentrated mostly on the fuel supply, he put a filter from the tank into the engine to get rid of any crap floating around in the tank with the fuel. He also cleaned the inside of the engine.

One thing the guy found was that the moped almost didn't get any fuel on the sparking plug at first, would this affect the performance of the moped once it has started?

Im certain it is something with the engine or maybe the exhaust.


Im wondering if anyone has found any solution to this problem, i have read some previous postings about Kinroads but they dont seem to offer any explanation to what may be wrong. (A thing such as the Valves can't be wrong beacuse it doesnt even have valves.)

Do anyone think it might be wrong settings on the fuel/air mix? Im not very technical but i hope someone with more knowledge might have a solution:)

Cheers
/Christofer

[ally1756]

can almost gurantee its the valve clearences if its a 4 stroke?

[makem]

Unfortunatly no, its a 2-stroke så no valves

[cyberconte]

Stuck floater? I'm thinking maybe its getting stuck in a high position, which would explain the cut-out and low fuel on the plug soon after... but thats just a wild guess...

[enu06]

Thats the problem then, no valves +2stroke. Chuck it away and get a 4 stroke, then you can blame the valves. Seriously though, when 2 strokes start going wrong big time its time to say good bye.

[makem]

Okay i'll throw it away then:)

Maybe i'll will try the stuck floater that Cyberconte suggested first, hehe.

[Rusty]

Not overheating is it?

[makem]

Hmm, it it possible that it is overheating. It would sound logical that it gets hot and shuts of, then when i restart it it won't run well until left to cool down.

But how can i tell for sure?

[Rusty]

Thats a bit beyond me im afraid. I guess a start would be to make sure the fan is ok and that all the plastic cowling around the head is attached as it should. I think that there are 2 bits of plastic around the engine. One fits onto the fan cover and the other on to that and around the engine. Im guessing that they direct the air flow as needed and if they were not as they should be, perhaps it would overheat. Just a theory.....

[makem]

Overheating might be the problem but not because of the plastic, becuase the moped ran fine for a year before this problem occured.

[enu06]

do you have a kick start lever on it? if it is overheating and getting tite you will probably be able to tell by gently kicking it over, (the engine, not the bike, temper temper!), or longer job, take the head off and look for score line in the barrel, hopefully it the piston tightening, not the crank end. Do what Rusty says first though.

[makem]

Yeah i've kickstart, will check out your and Rustys suggestions today:)

[ally1756]

just out of interest did u remove the front mudguard or did it come without it?

[Rusty]

ally. It's one of the older style like my old Sinski. No mudguard on them.

[makem]

no, nothing has been altered on it.

Unfortunatly i didn't get any time to check it out, try it this weekend instead.

At least i have a new thing to look at: the fan:D

[tungy999]

is it air cooled or liquid cooled