Balance chain and timing.

Questions regarding the DR800

Re: Balance chain and timing.

Postby GraySWTRF » Sat Mar 03, 2018 5:34 pm

Another view.
Best pic I could get sorry but it shows three flat sides.
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Re: Balance chain and timing.

Postby GraySWTRF » Sat Mar 03, 2018 6:35 pm

Or have I adjusted the valves wrong ?
Inlet .05
Exhaust .10
At tdc.
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Re: Balance chain and timing.

Postby BigBob » Sat Mar 03, 2018 10:28 pm

Valve clearances are correct.
The flat of the decompressor arm should be facing down to abut against the rocker arm.
I can`t see how it can`t depress the rocker arm when activated.
Have you pushed the decompressor arm forward with your thumb rather than relying on the cable?
You should be able to see the rocker arm depress when you do (if you have the valve cover removed of course)
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Re: Balance chain and timing.

Postby GraySWTRF » Sun Mar 04, 2018 8:57 am

Yes I have moved it all way round by hand with and without the cable lever piece attached and it doesn't come into contact with the rocker at any point.
Both inlets and exhaust we're set at tdc or have I adusted them at the wrong point in the cranks revolution ?
As you can see by the pic I have a lot of thread showing on that rocker adjuster ?
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Re: Balance chain and timing.

Postby BigBob » Sun Mar 04, 2018 1:33 pm

Maybe you are 360 degrees out. Something is certainly not right.
I would back off the tappet clearances, rotate through 360 and try setting them again.
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Re: Balance chain and timing.

Postby nug » Sun Mar 04, 2018 2:35 pm

My betting is that you have got it 360 out so the exhaust valve would still be partially open in the exhaust cycle. Easily done. that will give you excess clearance when in the correct part of the cycle leaving the rocker arm way to low to be activated by the decomp shaft.
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Re: Balance chain and timing.

Postby GraySWTRF » Sun Mar 04, 2018 4:15 pm

Yup your right I have redone valves gap and yes I was on the wrong stroke.I had a little scream and all seems well now..
Just need to sort the carbs from overflowing next
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Re: Balance chain and timing.

Postby BigBob » Sun Mar 04, 2018 7:00 pm

:tup:
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Re: Balance chain and timing.

Postby nug » Mon Mar 05, 2018 1:49 am

Good stuff :tup:
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Re: Balance chain and timing.

Postby GraySWTRF » Sat Mar 10, 2018 4:28 pm

Still struggling and a non starter.

I have the balance chain markings all aligned with the marks on all three the gear sprockets.
Piston is at Tdc.
The marking on the rotor is alinged with the pointer on the left casing.
I have the marks on the camshaft in line/ parralel with the cam cover face.
Now have I got the camshaft lobes the right way round as per pic ?
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