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PostPosted: Thu May 04, 2017 4:13 pm 

Joined: Sat Feb 20, 2016 7:58 am
Posts: 201
Location: Sweden
Ja-Moo wrote:
You need a micrometer to use that. Find TDC then with the micrometer add the 3 whatever mm to the length and reinstall. Make sure you are BTDC and pun the piston up until it touches. Or just use a digital caliper. Timing is not your problem, but it does need to be correct.


OK I understand.

Guess I can't do much before the Lakeland box arrives. It will be interesting to see if it solves this.


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PostPosted: Thu May 04, 2017 4:48 pm 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9826
Location: North Central NC
It's on the way as of this morning.

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If it surges, that's normal, upshift.


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PostPosted: Fri May 05, 2017 1:26 am 

Joined: Sat Feb 20, 2016 7:58 am
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Location: Sweden
Jim wrote:
It's on the way as of this morning.


Thanks Jim! :thumbup:


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PostPosted: Fri May 12, 2017 8:32 pm 

Joined: Tue Apr 28, 2015 6:28 am
Posts: 11
Location: Fort Meade, FL
Read through this entire thread. Just my $0.02 worth, but seems like you have worked over the ignition and fuel delivery paths pretty well. I would start looking for more obscure problems; vacuum leak, cylinder base gasket, plugged muffler, collapsed piston skirt on the intake side, things like that.


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PostPosted: Sun May 14, 2017 4:21 pm 

Joined: Sat Feb 20, 2016 7:58 am
Posts: 201
Location: Sweden
I bought this kit to do a leak down test:

https://www.motionpro.com/product/08-0071

Pretty nice stuff but a bit expensive. Unfortunately it seems to be intended more for Yamahas and Hondas. None of the expansion plugs did fit into the exhaust and the inlet adapters are designed for rubber mounts. The pump can test pressure, but not vacuum that I now understand is important too.

I think it's usable on my Yamaha RZ350 though so not a complete waste but a bit of a bummer.

I need to come up with something different, maybe something similar to this: http://kawtriple.com/mraxl/cranksealtes ... altest.htm


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PostPosted: Wed May 17, 2017 9:11 am 

Joined: Sat Feb 20, 2016 7:58 am
Posts: 201
Location: Sweden
Lakeland box arrived safe, thanks Jim!

Box switched now and spark on all plugs, but turned out it's not the ignition units or rectifier that are the problem.


Last edited by Pecka on Wed May 17, 2017 9:11 am, edited 1 time in total.

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PostPosted: Wed May 17, 2017 9:11 am 
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Joined: Wed Jun 08, 2011 11:34 pm
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Location: North Central NC
Don't keep us in suspense.

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If it surges, that's normal, upshift.


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PostPosted: Wed May 17, 2017 9:50 am 

Joined: Sat Feb 20, 2016 7:58 am
Posts: 201
Location: Sweden
Jim wrote:
Don't keep us in suspense.


Ops sounded like I found the problem but haven't unfortunately.


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PostPosted: Wed May 17, 2017 9:56 am 
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Joined: Wed Jun 08, 2011 11:34 pm
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Location: North Central NC
So you mean you now have good spark on all three cylinders, but it's still not firing on all three? Is the problem still just the middle cylinder? This thread is very long... what's the sumary? You swapped carbs, maybe more than once, what did that do?

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PostPosted: Wed May 17, 2017 10:00 am 

Joined: Sat Feb 20, 2016 7:58 am
Posts: 201
Location: Sweden
Jim wrote:
So you mean you now have good spark on all three cylinders, but it's still not firing on all three? Is the problem still just the middle cylinder?


Yes it's only middle cylinder.

I have spark with the plugs laying on the cylinder heads. Could cut off the electrode on an old plug and see if it jumps, as suggested earlier in the thread?

Swapped complete carb assys with left cylinder but it didn't move the problem.


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