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09 450R Hard to Start - Help......

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Read other threads but still struggling.

Here is the deal:-

42 hours

Valves check and reshimed inlets slightly to spec at 40 hours

Triple checked valve timing using TDC and ignition timing marks etc

It has a PCV with Eddie's Map

Runs beautifully once started and does not stall easily

Hardest to start cold. It takes numerous kicks. If you clear it and kick hard it fires but will not run up. I have to kick (no throttle) listen for firing and then open the throttle a bit to get it to continue to fire....and run. Seems like a clogged air filter but it is clean and oiled with Belray...

Once it is hot it is the same story but just not as difficult.

This is really anoying me as I race cross country here which are dead engine starts.

Anything I have missed?

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Is your MIL blinking any codes once you get it started? Maybe a bad sensor and/or sensor connection? or bad ground somewhere?

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Haven't noticed it blinking. I will watch it closely next time I start the bike. Good suggestion thanks.

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From cold, are you priming the pump with a few long easy kicks, then pull fast idle, then kick it from up against compression?

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I usually pull the fast idle - few easy kicks - then a full stroke on TDC. Is it important to pull the fast idle after the easy kicks?

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i had the hardest starting 09 that honda ever built. I remapped the software retarding the igintion at 0 throttle 1000rpm, this helped but was still a pain in the ass. I switched to the 2010 cam and now i have the easiest starting bike made. not tdc needed, just kick it anytime anywhere and it will start. i ride woods with it some. i flipped it upside down today. it sat there for about a minute before i was able to get it up. Rolled to the bottom on the hill and it started first kick. highly recomdended u switch to the 2010 cam

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i had the hardest starting 09 that honda ever built. I remapped the software retarding the igintion at 0 throttle 1000rpm, this helped but was still a pain in the ass. I switched to the 2010 cam and now i have the easiest starting bike made. not tdc needed, just kick it anytime anywhere and it will start. i ride woods with it some. i flipped it upside down today. it sat there for about a minute before i was able to get it up. Rolled to the bottom on the hill and it started first kick. highly recomdended u switch to the 2010 cam
How much did the 2010 cam set u back?

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02 CAMSHAFT ASSY.

14100-MEN-A31 (replaces 14100-MEN-A30)

This is what I found on the microfish for an 09? Can you confirm it is the 2010 cam?

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Hi sktmithyexc

Has this problem only started since installing the pcv?

both myself and another mate of mine had similiar issues not long after installing our pcv's. Like you said it starts after a while but if you stall it, we had to wait for them to cool down before they'd start again. Mine had the yoshimura map and the other has the stock i believe but with autotune.Since removing we have had no problems.

Try disconnecting yours first and see how you go

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Come to think of it most of the issues are post PCV. I wonder if it takes extra power from the magneto to fire it up due to the PCV load..... Would make no difference if you had a battery but without one the "kick" has to charge up the fuel pump, ignition and pcv..

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Eddie, it is on my wife laptop back home - will need to check. I think it is minus 5% but not certain. It is the 'stock engine' map Jonathon sent.

This starting issue has me baffled... for sure.

I have checked valves, cam timing, new spark plug,....

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The cold starting is like a clogged airfilter. A sort of bogging then once it finally picks up the motor runs perfectly (much better than stock with Eddie Map on board :banana:).

Edited by SKTMithyEXC

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I would bet that it's low fuel pressure. This has been well covered, but replace the fuel pump filter in the tank and clean the injector.

This is similar to symptoms I had.

To clean the injector, hook it up to a 9 volt battery (remove from bike first) to get it to flow, then back-flush with carb clean and compressed air.

Then go get one of the in-tank pre-filters from CRF Stuff and that should clear it up for good.

If not, try a new injector. This is all assuming your valve timing is correct.

That could also account for these syptoms. Years ago, I had a '04 Crf 450r that I ran one tooth advanced on the timing chain because it was so stretched it was hard to line up otherwise! It ran, but had no top end whatsoever. Maybe you got it one tooth retarded?

Hope this helps!

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Did yours run perfectly though?

I have had to remove the filter and clean it before, and at that time the bike had no top end and would cut out. It does not have any of those symptoms but is a *&&^% to start.

I have a CRFstuff filter (from Australia :banana:) and I use a special filtered funnel.

42 hours on a cam chain - hope it is OK - the marks on the ignition and cam line up pretty good.

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Then I would guess it is you injector. When I took mine out, there is a little "pre-filter" in the mouth of the injector. This was full of "fluff" that looked like belly button lint! Obviously, stuff is getting past the fuel pump filter. But, since using the in-tank pre-filter like you have, no problems!

(knock on wood!)

Try using the "clean-out method" and see what happens.

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Thanks will try cleaning the injector first. The 2010 cam is $623.55 here in Australia compared to USD192 for you guys, someone is getting more then their fair share.

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My 2010 cam was $280 from T & T Motorsports 502-348-4847 in bardstown ky. Some dealers are having trouble finding the part number. Honda was late sending out the info

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