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Post by JR on Feb 22, 2012 18:03:58 GMT -6
you can take a large piece of sand paper on a mirror and do figure 8s to smooth the head and make it ready to go back on Very,very fine paper! And oil. But with a very thick piece of glass and lapping compound one can even do better. JR |
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Post by jahunt on Feb 22, 2012 18:21:11 GMT -6
Not ignoring the post today, just cleaning up the machined surfaces on the head and cylinder with a 3M scotchbrite pad tonight waiting for the gasket to get here Friday. Since I didn't pull the valves from the head, I didn't want to get Sand paper grit near the valve seals. Same with the cylinder(still on bike), no way to block the water jackets. Always used scott pads in the past, with a final cleaning of paper towels and brake cleaner before I lay the gasket down.
The timing marks on the flywheel don't align with TDC(seems to be a common problem), so I'm just going to put the piston to visual TDC, then install the cam lobes facing down(Also aligning the cam gear holes with the head surface). Any other tips on timing/alignment?
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Post by JR on Feb 22, 2012 18:26:31 GMT -6
Generally the TDC mark on the flywheel will always be just a tad advanced to TDC with the piston and cam. Once assembled before you even attemp to fire her you can turn it over by hand and check the timing, set the valves by the specs in the manual and then fine tune after she runs a bit.
Also don't want to forget to run her for a bit get her nice and warm and then let her cool bone cold and re-torque the head.
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Post by jahunt on Feb 22, 2012 18:31:01 GMT -6
I like the idea on retorquing the head. The head studs on these motors are weak, if there was an aftermarket performance alternative I would buy them.
Always used ARP Headstuds on my turbo vehicles. Helped the head from lifting under boost.
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Post by jahunt on Feb 22, 2012 18:32:43 GMT -6
The TDC mark is about 25% away from TDC. Very odd why they would mark them this way.
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Post by JR on Feb 22, 2012 18:34:58 GMT -6
Yep it is and it's more than on my engine. Also remember you can fine tune these vavles with the engine running. That's a nice feature on this engine.
JR
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Post by jahunt on Feb 23, 2012 13:22:32 GMT -6
Head Gasket is being delivered today!
Quick question, there is a breather hose coming from the gearbox/rear-CVT case. Does this remain vented to open air or should it connect to the airbox?
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Post by JR on Feb 23, 2012 13:26:09 GMT -6
Airbox. Should be a diagram in the helix manual.
JR
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Post by jahunt on Feb 23, 2012 14:06:59 GMT -6
Fasssst Response! I should have some new pictures of the head gasket installation, timing chain tension installation, etc.. tonight!
In the meantime - working.
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Post by ronscycle1 on Mar 30, 2012 10:44:25 GMT -6
chinese junk
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Post by JR on Mar 30, 2012 11:05:31 GMT -6
Well they said the same thing about the Japanese junk years ago when I was driving a Datsun for 35mph while my 350 Chevy Silverado at 7mph was sitting in the yard. I was making $3.00 per hour and gas went to $1.75 overnight on the so called gas shortage of the 70's.
Now look where the Japanese vehilcles are today. One doesn't have to own the Chinese junk, you can always buy more expensive junk! ;D
JR
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