Balance chain and timing.

Questions regarding the DR800

Re: Balance chain and timing.

Postby GraySWTRF » Tue Mar 13, 2018 10:33 pm

Could it be the diaphrams ?
They have no holes or splits but they are the only parts I haven't changed and I know they can stretch.
The Torque Monster,DR 800 SL.
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Re: Balance chain and timing.

Postby GraySWTRF » Wed Mar 14, 2018 8:42 pm

Also I have set float levels to the book,and they are both slightly higher than the bowl face.
Should I drop the levels ?
I put a red mark in picture and the levels I have are the same on both carbs at the top edge of the red mark.
Gone through carbs yet again and still not starting.
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Re: Balance chain and timing.

Postby nug » Wed Mar 14, 2018 11:27 pm

Float level is not an issue. It could make it too rich of course but I don't think you are at that point yet from what you have said. If this was the case you would be getting some sort of firing if it only wetted the plugs. Turning over with plugs out will not suck fuel through as there is not sufficient vacuum because the cylinder is sucking through the open plug holes. Diaphrams should not stop it drawing fuel up with the throttle closed. I have a feeling that you have the idle speed screw adjusted up a bit high. This means you are not drawing enough vacuum over the idle circuit. unscrew it until the butterflies are fully closed and also check that the throttle cable is allowing full closure. If all ok, turn the engine over WITH PLUGS IN. It should pull some fuel through and hopefully fire. If it does then gently give it sufficient throttle to keep it running. You can then adjust the idle speed screw to get a decent idle speed. Good luck :tup:
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Re: Balance chain and timing.

Postby GraySWTRF » Thu Mar 15, 2018 7:20 am

Thanks Nug but I have already tried tickover at all positions,and I will check butterfly tonight but sure it returns fully to closed position on both carbs simultaneously.
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Re: Balance chain and timing.

Postby GraySWTRF » Sat Mar 17, 2018 8:56 am

I can eventually after turning over a zillion times get this thing running but only with the help of jump starting and with the van running.
So I have read that the pulse coil can be the problem ?
Maybe it's sparking fine out of the motor but reluctant inside ?
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Re: Balance chain and timing.

Postby GraySWTRF » Sat Mar 17, 2018 8:58 am

I can eventually after turning over a zillion times get this thing running but only with the help of jump starting and with the van running.
So I have read that the pulse coil can be the problem ?
Maybe it's sparking fine out of the motor but reluctant inside ?
Once it's running it's seem ok but occasionally just dies.
The Torque Monster,DR 800 SL.
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Re: Balance chain and timing.

Postby nug » Sun Mar 18, 2018 11:16 pm

Very strange. That said, big singles can cough themselves out on tickover if they are a little slow or gave shitty fuel in them. Best way to check the ignition is to actually ride it and labour it at full throttle in a high gear. This will show any weaknesses in the ignition straight away.
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Re: Balance chain and timing.

Postby GraySWTRF » Mon Mar 19, 2018 2:09 pm

It is strange,agreed.
It's fresh fuel going in and when revved it's not happy.
When I get chance I will give it a try up the road.
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