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Discussion Starter #1
Ok I purchased this bike in pieces . Its a 2007 An650A The cvt needs to be rebuilt . I want to hear this motor running before I proceed to the cvt. I have compression , spark fuel . The starter turns the motor over, I have confirmed fuel comming into the cyclinder and spark plugs fireing. Any Ideas as to why it doesn't fire up
 

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bobkat1234 said:
Ok I purchased this bike in pieces . Its a 2007 An650A The cvt needs to be rebuilt . I want to hear this motor running before I proceed to the cvt. I have compression , spark fuel . The starter turns the motor over, I have confirmed fuel comming into the cyclinder and spark plugs fireing. Any Ideas as to why it doesn't fire up
If all is as you say, then you will have to look at the valve timing. Is it trying to start? Maybe bangs once now and then? We need a bit more info.
 

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InfernoST said:
Possibly the sidestand switch.
I had the impression that the engine was out of the frame. Like I said, we need a bit more info. :)
 

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Yeah.........We need much more information to diagnose the problem - remotely!
 

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Discussion Starter #6
I grounded the plugs against the motor and hit the starter button There is plenty of spark . To me that would rule out the side stand switch. The cvt transmission is out of the bike at the moment waiting on parts. The motor does not seem to give any indication like it wants to start ie a bang . The fact that I am turnning the motor over with the starter and getting spark and fuel . This thing should at least kick over and start for a second. I even tried to use some choke cleaner down the intake with no luck
 

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Could have flooded it try with the throttle wide open.
 

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Discussion Starter #8
Also as far as the engine being out of the frame I removed the frame to get the cvt out That fine design does not allow for the top two bolts to come out. I put the frame back to allow myself to have a Rolling bike. Only to have to remove the frame again to remove the starter clutch cover. In this case the bottom two bolts could not come out. At present the frame is back on the motoreverything else is off
 

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Have you checked the i/e valves for movement?
 

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bobcat - welcome to the forum. :hello2:
Why don't you take the opportunity to introduce yourself in the 'Who are you, where are you from' section and it would also be quite useful if you could update your profile with a location.

If the engine has been out of service for a while then it may take some cranking to achieve a start.

You clearly know what you are doing, no one would tackle a non runner if they were not! :)

My suggestions would be to ensure you have a tip top battery and maybe even consider using a slave for the initial crank and warm up.

I would try spraying a wee bit of oil through the spark plug holes, trying as best you can to get it on top of the top rings.

Connect a car battery to the bike battery using jump leads and give it another go - this should maintain a good spark and the required cranking speed for an extended period of attempted start.

It would not take long to whip the covers off and check the valve operation makes 'timing sense'.

Let us know how things proceed.
 

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We, a few of us that is, have had to turn the throttle about 2/3's while cranking after it sets for a time. But it could be that without all the electrical plugs connected to the CVT and such it will not fire. But with spark and fuel it should. Try just a bit of throttle while cranking but be quick to release before it revs too high with no load. Just so you know, the power flow is in this order, from the engine to the CVT FIRST, then to the clutch, then to the final drive and last to the wheel. So without the CVT there is NO LOAD and it will RAP real REAL fast, before the rev limiter can cut the spark it may go to 10,000+ RPM.
 

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Discussion Starter #12
Well Guys thanks for the imput. Norm I gave the two batteries a try with a little oil down the spark plug holes. I also ran a seperate ground directly to the starter.Now it is apparant that the engine is not cranking fast enough. Even with the two batteries in series there is a drag . You can crank it for about 15 seconds and it just slows down. I believe there is something wrong with the starter. I proceeded to take it out took it apart cleaned the armature, took 400 grit sandpaper to it. The brushes looked great, got continuity through the brushes but none from the shaft to the armature. maybe a break ??. I put it back together put 12 volts to it out of the bike . It turned over fine,put it back in the bike and under a load it seems to just die. I also tried opening the throttle 2/3 but feel the motor is just not turning over fast enough :(
 

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Discussion Starter #13
Well now I am scratching my head. I figured being that the starter was out of the bike I would take it to the auto electric shop and get it checked out. Well that being done I was told starter is in great shape and to look somewhere else for my problem. any Ideas ??
 

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bobkat1234 said:
Well now I am scratching my head. I figured being that the starter was out of the bike I would take it to the auto electric shop and get it checked out. Well that being done I was told starter is in great shape and to look somewhere else for my problem. any Ideas ??
Like I asked at the start of this forum - have you checked out the valve operation?
 

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Discussion Starter #15
well one problem solved . I changed the battery cable going from the relay to the starter and it spins over great. Still doesn't even attempt to fire. Which as it was suggested earlier in this post VALVE Movement. Thanks peelbrow.Just for the hell of it I am going to do a compression test on these cyclinders. This bike was sitting else where for a while and I was assured by the prior owner that the bike was stored inside but there is evidence of water intrusion down the intake . Odd for something stored inside.I think the compression test will tell all I am hoping for 150 psi
 

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I see your bike has 80,000 miles on the motor and we don't know if the previous owner ever had a valve adjustment. I think you are on the right track by doing a compression check.Also, you mention signs of water. Are you sure your gas is not contaminated ?
 

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If you got spark, fuel, and compression it should run. :?
 

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MJR said:
If you got spark, fuel, and compression it should run. :?
Yes, but only if the valve and ignition timings are correct. :D
 

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peelbrow said:
MJR said:
If you got spark, fuel, and compression it should run. :?
Yes, but only if the valve and ignition timings are correct. :D
If the bike ran before the CVT was removed why would any of that change? I'm under the impression the rest of the engine/drivetrain wasn't taken apart just the CVT removed.
 

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Perhaps the computer may not be letting the bike start because it can't see the CVT and therefore not receiving the right signals. Just a thought.

bobkat1234 said:
Also as far as the engine being out of the frame I removed the frame to get the cvt out That fine design does not allow for the top two bolts to come out. I put the frame back to allow myself to have a Rolling bike. Only to have to remove the frame again to remove the starter clutch cover. In this case the bottom two bolts could not come out. At present the frame is back on the motoreverything else is off
Are the crank position and other motor related sensors hooked up?
 
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