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Forum: 2008 - 2012 Ninja 250R Tech Talk May 2nd, 2020, 05:15 PM
Replies: 199
Views: 29,418
Posted By pdwestman
That is why the factories designed Automatic Cam...

That is why the factories designed Automatic Cam Chain Tensioners way back in the Late 1970's/Early 80's.

Most of them are quite reliable with standard tension valve springs & standard lift cams....
Forum: 2008 - 2012 Ninja 250R Tech Talk May 1st, 2020, 06:20 PM
Replies: 199
Views: 29,418
Posted By pdwestman
Personally, I'll suggest that one can over-adjust...

Personally, I'll suggest that one can over-adjust a manual tensioner by doing it too often, trying to keep zero slack, zero slack, zero slack!
If it has one little spot that it is just a touch too...
Forum: 2008 - 2012 Ninja 250R Tech Talk May 1st, 2020, 10:24 AM
Replies: 199
Views: 29,418
Posted By pdwestman
Don't blame the part. You disassembled something...

Don't blame the part. You disassembled something that was never intended to be disassembled.

I hate to have to say things like this,
How much is a service manual? How much is a cam chain...
Forum: 2008 - 2012 Ninja 250R Tech Talk May 1st, 2020, 08:03 AM
Replies: 199
Views: 29,418
Posted By pdwestman
I'm guessing that some how or another you have...

I'm guessing that some how or another you have got the spring wound backwards & holding the tensioner retracted, instead of the spring trying to extend the plunger.
You need to look more carefully...
Forum: 2008 - 2012 Ninja 250R Tech Talk April 30th, 2020, 03:42 PM
Replies: 199
Views: 29,418
Posted By pdwestman
Do you or do you not have the T lock holding the...

Do you or do you not have the T lock holding the center shaft from spiraling out?

You would have had to build your own T lock, there is a diagram in the oem service manual.

Like his second from...
Forum: 2008 - 2012 Ninja 250R Tech Talk April 30th, 2020, 02:46 PM
Replies: 199
Views: 29,418
Posted By pdwestman
maverick9611, You need to remove the 'T' lock in...

maverick9611, You need to remove the 'T' lock in the cap bolt hole after installing into the chain tunnel. Otherwise it Can't Work.
Forum: 2008 - 2012 Ninja 250R Tech Talk April 27th, 2020, 08:38 AM
Replies: 199
Views: 29,418
Posted By pdwestman
I think you have confused yourself. Thinner Shim...

I think you have confused yourself. Thinner Shim Increases the tappet clearance.

And that is what I am suggesting you should try.
Intake tappet clearances of .30-.33mm / .012-.013inches.
Forum: 2008 - 2012 Ninja 250R Tech Talk April 27th, 2020, 08:18 AM
Replies: 199
Views: 29,418
Posted By pdwestman
Over-spec clearance is exactly what I am...

Over-spec clearance is exactly what I am suggesting, to reduce reversion.

From our earlier conversations,
"Feeling for actual tappet clearance on the intake rocker arms, the cam lobe closing...
Forum: 2008 - 2012 Ninja 250R Tech Talk April 26th, 2020, 04:47 PM
Replies: 199
Views: 29,418
Posted By pdwestman
Thinner shims makes a WIDER Gap, don't they? If...

Thinner shims makes a WIDER Gap, don't they? If you were running a 270 in a valve at near max spec, my suggestion is to install a 260.

That is -.10mm of shim size to gain clearance to allow the...
Forum: 2008 - 2012 Ninja 250R Tech Talk April 26th, 2020, 03:11 PM
Replies: 199
Views: 29,418
Posted By pdwestman
You are going 2 sizes thinner or -.10mm /...

You are going 2 sizes thinner or -.10mm / -.004inches correct? To Increase intake tappet clearances a little beyond specs, correct?
Forum: 2008 - 2012 Ninja 250R Tech Talk April 25th, 2020, 07:58 PM
Replies: 199
Views: 29,418
Posted By pdwestman
maverick9611, I'll suggest to use a dial...

maverick9611,
I'll suggest to use a dial indicator to check the duration of the closing ramps of the intake cam lobes. Or simply install 2 sizes thinner (.004" thinner) valve shims into all 4...
Forum: New Members April 25th, 2020, 07:45 PM
Replies: 7
Views: 1,124
Posted By pdwestman
Hi from Lander, WY, USA

I have been working on Kawasaki motorcycles professionally since 1976.

I was co-owner of the 1st & "Oldest Kawasaki Dealership in the USA" from 1990 to 2016.

Still maintaining what we sold &...
Showing results 1 to 12 of 12

 
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