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Gary Patch

Linhai 300 idle speed

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Hi my linhai 300 is hard to start and  engages gears at idle which is 1200 rpm was looking at cdi says on it 7500 rpm does this mean quad should idle at 7500 rpm as this would explain transmission problemb as idle is too high thanks gary

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My guess is that bike should idle at about 800 to 1000 rpm warm and 1200 at maybe a choke position. If it’s reving high after it warms up you can make an adjustment on the carburetor or intake if it’s fuel injected. 

7500 would be the maximum  revolution limit where the cdi would go into safety mode and shut down. 

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thanks for reply have adjusted carburettor wont idle slower without cutting out spark not the best so am thinking bad cdi or coil

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Turns out it should idle around 1200 rpm was a broken clutch shoe causing gears to enguage at idle,just have the problemb of hard to start with weak spark so was going to start replacing coil  etc any input welcome

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I would change the secondary coil and spark plug wire.  You can test the coil first but it’s cheap enough to replace. Don’t forget the wire also.  

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That is the secondary that you ordered.   Hopefully that’s the problem. I think it is but I’ve been wrong before.  

  I’m surprised that 1200 rpm is the norm. I would have figured 1000 max.    

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New coil in frank  not really better I put volt meter to stator jointers and all seem to be charging any suggestions what to do next

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That with a fresh plug also ? 

Only other thing I can think of would be the regulator. The stator is putting out proper voltage ? Battery is putting out proper voltage ? 

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yep battery plug and stator ok wasn't aware regulator could effect spark but its cheap enough to change any way will let you know thanks for help

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Hi frank tried new regulator and blew main fuse sent back got another regulator and does exact same thing any ideas please ?

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Ok well that’s not good. So when you wire it up everything plugs right up and your putting wires right back were they were ? Any differences in the old to new ? 

And have you reinstalled the old one to see if it does the same thing?

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Have you tried to put the old one back to see if it does the same thing ? 

My feeling is whatever is going on will be a dead short so take a deep breathe and let’s start looking  over things to see if there is a wire shorted out someplace or a faulty ignition connection etc.  What’s the set up ? How May wires are plug in and how many are bolt up.  There has to be a dead short someplace here. 

 

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It was starting and running with old one just unplugged ,I can't get any spark at all now plugged old one back in and doesn't blow fuse but still no spark the new ones were cheap Chinese ones but both did same thing I will try check wiring and then perhaps try cdi thanks for input frank

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Just before this issue the electronic 2x4 4x4 stopped working so guess electrical issue ...not my strong point 🙃

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On well it’s one of mine so let’s get the manual downloaded and pick it apart. Give me a little bit 

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Do you have the acceptable range shown in the manual for ohms on the pick up coil ? 

My guess is possibly the cdi shit the bed when you used the cheap rectifier. Something caused a dead short. 

OEM always when it comes to the cdi and the rectifier.   The stator you can get away with but I’ve never had any luck with the cheap parts like a cdi and or regulator/rectifier.   

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Yes is in range had problemb of no spark before changed regulator though will check through wiring and ignition then go for the cdi was going to try cheap Chinese one though just to see  tried 2 regulators both did same  thanks again frank for input

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That could be a solenoid, a dirty plug or connection, switch contacts etc.  Nothing burnt up though right ? Fuses were all good prior to the rectifier swap out ? Nothing happened to the bike? Got banged? Any service work done that could have resulted in a pinched wire ? Check along the neck of the bike on the front end where everything comes up to the controls. I would think you should also unplug, clean and add dialectic grease to the connections as well because this honestly could be something along those lines. 

 

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