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Raptor 660 Information => 660 Motor Mods => Topic started by: pcataldo on September 12, 2008, 07:54:23 PM

Title: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: pcataldo on September 12, 2008, 07:54:23 PM
My nephews 2001 660 raptor has been at the Yamaha Authorized dealer for 1 week raptor would not turn over, I changed Starter, Relay, Coil, Regulator,Plug, Oneway.  THe Dealer Said that the Compression is to high thats why it wont turn over

Help, I am out of Ideas???????????????????????????

Any help or direction is greatly appreciatted

Phil
Title: Re: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: Colorado700R on September 12, 2008, 08:12:50 PM
is the decompression mechanism working properly?  11-1 shouldn't be too much compression if it is.

Aaron
Title: Re: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: 1FST690 on September 12, 2008, 08:13:29 PM
1st things first, can you manually turn the engine 360 by turning the crank? How much compression does it have? Does the starter TRY to turn the engine over? Any and all info you can provide will make it a ton easier to diagnose.
Title: Re: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: Peelz on September 12, 2008, 08:17:58 PM
There has to be a better reason than "too much compression"!  Like colorado said. Dealer is blowin' smoke up your a$$. It doesn't turn over at all? ??? If it tries to turn, but doesn't at all , problem may be worse than just compression.  :help:
Title: Re: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: pcataldo on September 12, 2008, 08:18:32 PM
I will Get More Info Tomorrow Thanks
Title: Re: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: pcataldo on September 12, 2008, 08:20:42 PM
I agree with you guys this dealer first said i was just starter relay, now he is changing his tone. He wants to ope motor translation more $$$$

Thats why i am reaching out to you guys

Thank you

Title: Re: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: Peelz on September 12, 2008, 08:24:45 PM
If it turns but spins free, need gear. If it turns but hard..battery or starter easiest, or wiring next. After that, it could be decompression mechanism not working. Not turning at all, starter, or relay.

worst case scenario-motor frozen..a-la YFZ450. Sorry Kyle, had to say it.
Title: Re: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: kyledvor61 on September 12, 2008, 09:30:10 PM
Quote from: Peels660 on September 12, 2008, 08:24:45 PM
If it turns but spins free, need gear. If it turns but hard..battery or starter easiest, or wiring next. After that, it could be decompression mechanism not working. Not turning at all, starter, or relay.

worst case scenario-motor frozen..a-la YFZ450. Sorry Kyle, had to say it.
you son of a bitch :(
Title: Re: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: UncleBeaner on September 24, 2008, 07:49:48 PM
pull the plug and try cranking it over :thumbs:
Title: Re: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: Tribal_superman on March 01, 2009, 01:32:49 PM
I have 11:1 compression and it starts everytime:D
Title: Re: 2001 660 Raptor 11:1 Compression - Hard to Start
Post by: 4stroker on March 01, 2009, 07:08:13 PM
put a grizzly 660 battery in the bike more cranking power. i had problems with the decompression pin shearing off after a while. get the battery and junk all the decompression parts u dont need to run them
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