Yamaha Jog RR throttle problem - Advice Please

Hi,

Been riding a Peugeot Trekker (2000) for 2 years and just changed to a
newer (2004) Yamaha Jog RR for something a little more light and
sporty.


It runs and the acceleration is good however everytime I open the
throttle above 50%-60% it seems to just lose power and if left with
open throttle it coasts to a stop with the engine cut out.


I assume there is some kind of fuel starvation
Whats the most likely cause, blocked fuel line or carb needle, lean
fuel mix?


Also whats the best way to clean a scooter carb if I do take it out to
strip and clean?


Thanks

UKCatalyst

 

How many times are you going to post this?

 

I concur with Petel....check your filter, lines, cap vent, and plug
color.

 

Using the patented Mavis Beacon "Hunt&Peck" Technique, Bike guy Joe

1) Leave some fucking context.
2) It's "colour", the clue is in the froup title
3) Never agree with Petel.

--
Wicked Uncle Nigel - To stay young requires unceasing cultivation of
the ability to unlearn old falsehoods.

WS* GHPOTHUF#24 APOSTLE#14 DLC#1 COFF#20 BOTAFOT#150 HYPO#0(KoTL) IbW#41
SBS#39 OMF#6 Enfield 500 Curry House Racer "The Basmati Rice Burner",
Honda GL1000K2 (On its hols) Kawasaki ZN1300 Voyager "Oh, Oh, It's so big"
Suzuki TS250 "The Africa Single" Yamaha GTS1000

 

If you hadn't noticed -- this thread is cross posted to three
newsgroups -- only one of which is UK specific.
--

 

If you're going to cross-post, this is the sort of problem you'll encounter.
Deal with it.

 

Wicked Uncle Nigel- please quit fondling your children and find
something to do.

 

"Bike guy Joe" - please learn to post correctly or **** off and find
something else to do. Your call, fucktard.

 

Which is where the language evolved !

 

Popcorn - check
sitting comfortably - check

 

Pip, eat a big steaming pile of shit and don't concern yourself with
my posting technique.....sorry I missed the class on proper posting.
BTW tell your mother I said "Thanks".

 

Just who do you think you are replying to, you idiot?

 

That's a Diamond Nine over your head, fucktard.

 

Even I am not so thick as to confuse myself with Pip.

Fuckwit

 

Is your own mother fed up with wiping your arse for you?

 

let me get this straight. whether someone spells it color, or colour is
somehow more the focus here than a meaningful answer?...........moron much?

 

mainjet's not plugged. If that was the case, it would start fine, idle
fine, but as soon as it reaches somewhere between 1/4 and 1/2 throttle in a
steady state (Opening at which the mainjet essentially takes over from the
pilot jet) it wouldnt run. If it was the pilot it wouldnt start. It is
definitely a starvation problem, the question is why. You havent said
whether this is a new unit or one purchased used. Speaking as a former
yamaha service tech, new or used can make a big difference to the pool of
possible diagnosis. If new, it could be something as simple as a misrouted
and kinked fuel line, but quite probably is grit in the fuel impeding proper
operation of the float needle. If it is a used bike...omigawd it could be
nearly anything. Did the previous owner reset the float height? (possibly
in an attempt to stop a chronic overflow condition from grit in the float
needle?). is the carb stock? Is there a fuel filter present? Is it partly
plugged?
You dont give a timeframe either. How quickly, under full throttle, does it
display this behavior? If quickly it's probably the float issue. If not
quickly perhaps a gas tank vent blockage. The tank vent blockage can be
easily tested. go out with the gas cap on loosely or not at all. Try and
re-create the conditions and see if the behavior persists.
I dont think its a choke issue. It will generally run with the choke on,
just won't idle when hot, makes a bit less power everywhere and it runs
rough but should start to clean out a little under sustained high rpm
operation.
Hope mr platypus doesnt object to my non-UK diction.
salut....John

 

Well, as the old saying went:

Great people discuss ideas,
Big people discuss things,
and little people discuss other people.

and was modified on the advent of the Internet to include:

And on the Internet, tiny people criticize other people's spelling and
grammar.

 

You forgot to say they bitch about proper "netiquet" and top posting,
ect. ;^ )

 

*smile* When I heard it, that was before the advent of the WWW and
broadband internet, so (a) there were fewer people on the internet, (b)
it wasn't so easy to get on the internet and if you made it, you usually
knew what you were doing, and (c) there was no broadband for home users
and people automatically snipped posts, etc.

But I suppose I could add a "microscopic people" line next time I have
to use it.