Go Back   ATVConnection.com ATV Enthusiast Community » Brand Discussions Area » Yamaha
Sign in using an external account
Register Forgot Password?
Search

Welcome to ATVConnection Forums!
Welcome to ATVConnection.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the ATVConnection Forums community today!


Reply
  #1  
Old 02-06-2008, 01:09 AM
Weekend Warrior
Garage is empty, add now
 
Join Date: Feb 2008
Posts: 1
Default HELP!! Raptor 660

Whats up everyone,

I am a new owner of a raptor 660. Now what I need the help with is: EVERYTHING!! I had to put the top half of the engine back together. I go to crank it up the first time, I got a couple of putters and that was it. After that, It sounded like it backfired through the carb and the exhaust a couple of times. I pulled the carbs off and put a little gas in the intake boots, still nothing. I checked the spark, it has a strong blue spark. I lined up the timing marks by the manual. Still nothing. I am a total idiot to four wheelers, thats why I bought a manual. Hand me a Small Block Chevy, now we're talkin! So any info no matter big or small it is will be greatly appreciated. Just a side note, I had to put a cam and a head on it; I threw a set of rings on it while I was in there. It has great compression also. The jug was in great shape, no scratches. Also the choke doesn't work, It's missing a couple of pieces off that. Also does the timing marks on the cam gear line up PERFECTLY to the head or is one of them off just a TINY BIT. And someone that has done timing before, please tell me exactly how you did it, just to see if I did it right. Thanks Again In Advance!
Reply With Quote
  #2  
Old 02-06-2008, 09:31 AM
Pro Rider
Runs a 730 kit from OMW with web109's and a 48mm lectron. It has some serious torque!
Garage is empty, add now
 
Join Date: Jan 2006
Posts: 683
Default HELP!! Raptor 660

did you check your valve clearances while you put her together?
Reply With Quote
  #3  
Old 02-06-2008, 09:47 AM
Raptor450's Avatar
Pro Rider
I ride, because football, basketball, and baseball only uses one ball!
1985 Yamaha Tri-Z 250
 
Join Date: Dec 2006
Posts: 2,407
Default HELP!! Raptor 660

Def check the valve clearances and check your timing again. I just went through all of this crap on mine. It wouldn't crank so I removed the head to inspect the cylinder. All that was fine, I re-installed everything, set the timing and it still wouldn't start. It would pop a few times like you said, I had fuel, good spark, and compression - still nothing. I took it to my mechanic and he said the valves were too tight and the timing was off. I didn't understand the timing, I double and triple checked it according to the manual. He said I lined up the wrong dots? I thought I did it like the manual said. Seems the 660 has a sensitive timing setting.
__________________
I ride, because football, basketball, and baseball only use one ball
Reply With Quote
  #4  
Old 02-06-2008, 07:49 PM
Pro Rider
Garage is empty, add now
 
Join Date: Jan 2008
Posts: 281
Default HELP!! Raptor 660

also check to make sure the parking brake piece isint out and it pushed if its out when u give it gas it will backfire and sputter so make sure its sucure
Reply With Quote
  #5  
Old 02-07-2008, 01:41 AM
Trailblazer
Garage is empty, add now
 
Join Date: Dec 2007
Posts: 44
Default HELP!! Raptor 660

The timing can be tricky because there is a little play in the chain, especially without the cam chain tensioner installed. Re-check with the tensioner installed. If it still looks right and it doesn't run move the cam sprocket a tooth and try again. If the doesn't work move a tooth the other direction and try again. I've had to do this and that did the trick for me.

Good luck.
Reply With Quote
Old 02-07-2008, 01:41 AM
Reply

Tags
02, 660, adjustment, adjustments, cam, chain, check, mark, marks, raptar, raptor, remove, set, tensioner, timing



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On