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GP wont start when hot?
Posted: Mon Apr 13, 2009 8:44 pm
by lockman69
GP wont start when hot?
200 Sil Stage 4, JL3 and Mikuni 24
Scooter starts 2nd kick every time from cold but once its warmed up it just doesn’t want to know.
Any ideas ?
Cheers Guys
Re: GP wont start when hot?
Posted: Mon Apr 13, 2009 8:53 pm
by camel
had this with a 22mm delly....was the needle valve worn
Re: GP wont start when hot?
Posted: Mon Apr 13, 2009 8:56 pm
by ArmandTanzarian
I'm sure someone far cleverer than me will know but have you tried a smaller pilot jet? Also are you using a remote filter? Sometimes fumes accumulate in the elbow when you stop and make it too rich to start. A suggested remedy is to turn off the fuel 100 yards before you stop and to make a small hole at the lowest point of the elbow to let the excess drip out when standing.
Re: GP wont start when hot?
Posted: Mon Apr 13, 2009 8:57 pm
by byron
could be for a number of different reasons...
- blocked petrol breather cap ?
wrong plug heat rating ?
plug gap ?
CDI ?
choke not closing ?
pilot jet too big ?
float needle worn ?
worn rings ?
crank seals ?
has it suddenly started misbehaving, or has it been getting gradually worse ?
does it go ok once it does start ?
Re: GP wont start when hot?
Posted: Mon Apr 13, 2009 9:18 pm
by lockman69
Cheers for the input Guys
It’s a new engine with new AF crank, bearings and seals. The carb, Cdi (Ducati) are all new also.
The scooter was recently set up on a Dyno, I should take it back to the tuner but I don’t want the hassle or to be with out the scooter as he does nothing in a rush and its time of work to get it there.
When the scoot is running it goes well with no obvious issues, but I will go through all your points and see how I get on.
Thanks again
Re: GP wont start when hot?
Posted: Mon Apr 13, 2009 9:21 pm
by sean brady scooters
you,ve got an air filter on have,nt you............?
Re: GP wont start when hot?
Posted: Mon Apr 13, 2009 9:25 pm
by lockman69
I have indeed...........bellows connected to the air box/filter..........................is this the problem ?
Re: GP wont start when hot?
Posted: Mon Apr 13, 2009 9:43 pm
by byron
lockman69 wrote:I have indeed...........bellows connected to the air box/filter..........................is this the problem ?
be worth trying without...
I had a 22mm carb [albeit a jetex] that would only easily start when warm without the air hose connected... I ended up changing the jetting to suit riding it without
Re: GP wont start when hot?
Posted: Mon Apr 13, 2009 9:46 pm
by sean brady scooters
what you need is ,..........a small 1mm hole in lowest point of bellows/filter...........
to drain off excess fuel..............
Re: GP wont start when hot?
Posted: Mon Apr 13, 2009 10:00 pm
by lockman69
Excellent.........shall give it a go.
Cheers guys
Brett (aka lockman69)