Need help setting up cam timing ! - Honda TRX Forums: Honda TRX 450R Forum
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post #1 of 6 (permalink) Old 11-01-2019, 04:26 PM Thread Starter
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Need help setting up cam timing !

hi all
I need good pictures or manual setting cam chain timing trx450R 2005 mod
Can someone help me ???

Arnt roger
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post #2 of 6 (permalink) Old 11-01-2019, 06:41 PM
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I’m not exactly sure what the “mod” part of you question is all about, but here’s a link.

https://www.garyhott.com/tech-caminstall.html
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post #3 of 6 (permalink) Old 11-01-2019, 11:22 PM
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Not sure if this will help you but I saved these pics I took a few years back. Look behind the cam too you will see a couple of Arrows on the Cam Tower.
Attached Images
File Type: jpg Cam Sprocket Line Up.jpg (342.0 KB, 4 views)

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post #4 of 6 (permalink) Old 11-02-2019, 08:46 AM Thread Starter
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hmm ....thank you for that,but where is porition of cam? when the crank are at tdc ?
it looks lika i have bad compression......but the piston and cylinder looks good when i have it off ...

when i try to start it shoot in the muffler and nothing more happends......i tryed to mount cam 180 degrees different too :(

Arh trx450R
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post #5 of 6 (permalink) Old 11-05-2019, 12:56 PM
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have you adjusted the decomp setting or checked the valve lash?

04 450r
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post #6 of 6 (permalink) Old 11-07-2019, 01:56 AM
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With the little 6mm Allen head bolt on the left side of the case (Stator Cover) taken out you should see an F and a T on the flywheel those are your timing marks. Line the T up with the center of the Timing Inspection cap... Which indicates the piston is at Top Of The Cylinder. The timing inspection cap is that 6mm Allen head bolt cap. So now you wanna make sure that your cam is aligned just like the picture I posted. You will see on the Cam tower that it has two Arrows, now with the T mark showing on the Flywheel, the 2 Intake cam lobes pointing towards the back of the quad cam marks should aligning with the Cam Tower Arrows that is Top Dead Center.

If it's off or 180 Degrees out then just re set the Cam timing until you see those arrows (Which are found right behind the Cam Gear) start aligning with the cam gear marks while the flywheel is on T and the intake lobes pointing t the back of the quad.

How is the valve Lash?

Intake.006 Thousandths
Exhaust Valves .011 Thousandths
Decompressor Arm Should be set to .022 Thousands

Do you have a Leak Down Tester? If so you can see where you're loosing your compression, you should have a little air escaping from the exhaust valves at TDC if you do put a Leak Down Tester on it.

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Last edited by Ryan94Wright; 11-07-2019 at 02:03 AM.
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