2001 raptor 660 won't start - Yamaha Raptor Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old 06-01-2017, 05:12 PM Thread Starter
Junior Member
 
Join Date: Jun 2017
Posts: 4
2001 raptor 660 won't start

Ok here's the deal, I have a raptor 660 that I purchased that wouldn't start. I've put a new battery on it, I'm getting fire to the spark plug I've double checked the timing marks, timing chain is good, had the carbs rebuilt, adjusted the valves and now all the bike does is try to start but blows the carbs off the boots.... I know you're thinking wth, but I eliminated the carb by spraying starting fluid directly into the intake and still NO START!!!! I'm getting fire and gas to the engine so, WHY IS MY BIKE NOT STARTING......

Sent from my SM-G935P using Tapatalk
Rod38801 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 06-01-2017, 05:41 PM
Senior Member
 
Join Date: Feb 2017
Posts: 294
Have you checked the compression?
Sixpack577 is offline  
post #3 of 12 (permalink) Old 06-01-2017, 05:47 PM
Senior Member
 
Join Date: Feb 2017
Posts: 294
Sometimes engines wear out, without breaking anything.
Sometimes a crack or bad gasket causes compression loss.
A valve can even be stuck open.
These all can prevent it from running, yet the engine will still turn over.
Sixpack577 is offline  
 
post #4 of 12 (permalink) Old 06-01-2017, 05:51 PM
Senior Member
 
Join Date: Feb 2017
Posts: 294
An engine needs 3 things to run.
Fuel, spark, and compression.
You have fuel, as you put it directly in the cylinder. That should have been enough make it attempt to start, backfire.
You have a spark timed correctly.
Which leaves compression.
Can be a cheap gasket or full rebuild.
Sixpack577 is offline  
post #5 of 12 (permalink) Old 06-02-2017, 12:14 AM Thread Starter
Junior Member
 
Join Date: Jun 2017
Posts: 4
Quote:
Originally Posted by Sixpack577 View Post
Have you checked the compression?
Yes it has compression

Sent from my SM-G935P using Tapatalk
Rod38801 is offline  
post #6 of 12 (permalink) Old 06-02-2017, 12:16 AM Thread Starter
Junior Member
 
Join Date: Jun 2017
Posts: 4
Quote:
Originally Posted by Sixpack577 View Post
Sometimes engines wear out, without breaking anything.
Sometimes a crack or bad gasket causes compression loss.
A valve can even be stuck open.
These all can prevent it from running, yet the engine will still turn over.
Weird thing is that if i keep trying to crank it it'll build up so much compression that both the carbs will completely blow off the boots

Sent from my SM-G935P using Tapatalk
Rod38801 is offline  
post #7 of 12 (permalink) Old 06-02-2017, 12:45 AM
I may be getting older, but I refuse to grow up!

 
Join Date: Jun 2012
Location: PACIFIC N.W.
Posts: 10,025
Garage
I suspect you have a intake valve problem if it blows the carbs off. A valve that doesn't close, is bent, or stuck will allow compression to blow the carbs off. I would check compression again and compare it with your manual. If you have a spark plug air fitting, presurize the cylinder at TDC and listen at the intake for leakage.

WELCOME TO THE FORUM.

'19 Can-Am X3, RS Turbo, 172 HP, 1300x15 STU #2 paddle, Tribute front, DynaTec controller, cat delete, GTP blow off valve, custom flame wrap, Bent Metal windshield, Blazer wiper, rear window, 48in LED light bar, 14in LED light bar, GTP LED side lights, S3 shock tower brace, aluminum rear pull plate, 5K Badlands winch, dual batteries, 5ft lighted whips, Rugged radio and intercom, interior lights, rock lights, chase lights, over $200 additional switches, YES, street legal with dirt tires.
DEZPERADO is offline  
post #8 of 12 (permalink) Old 06-02-2017, 12:48 AM Thread Starter
Junior Member
 
Join Date: Jun 2017
Posts: 4
Quote:
Originally Posted by DEZPERADO View Post
I suspect you have a intake valve problem if it blows the carbs off. A valve that doesn't close, is bent, or stuck will allow compression to blow the carbs off. I would check compression again and compare it with your manual. If you have a spark plug air fitting, presurize the cylinder at TDC and listen at the intake for leakage.

WELCOME TO THE FORUM.
I'm going to try this tommorow I'll keep you guys updated.....

Sent from my SM-G935P using Tapatalk
Rod38801 is offline  
post #9 of 12 (permalink) Old 06-02-2017, 11:35 AM
Member
 
Join Date: Jan 2017
Location: Southeast Wisconsin
Posts: 73
hi Rod. I see you are pretty new here. Welcome to the group. The gang here has helped me a lot. Keep up to speed on how things are going.
There is a lot of knowledge here and people willing to help.
Dale_W is offline  
post #10 of 12 (permalink) Old 07-28-2019, 03:28 PM
Junior Member
 
Join Date: Jul 2019
Posts: 1
Raptor 660 no start

I have an 05 Raptor 660 I replaced battery,Starter,Solenoid switch won’t crank..When I put screwdriver near solenoid it act like it wants to crank but won’t start...What is my problem?
Cdubdmann86 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Yamaha Raptor Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
2001 RAPTOR 660R won't start Jimmy Ortiz General 660 Discussion 8 09-16-2017 04:46 AM
2001 RAPTOR 660R won't start Jimmy Ortiz General 660 Discussion 0 09-12-2017 09:53 PM
Raptor 660 won't start or tow start has spark FLBOIRAPTOR Raptor 660 Maintenance 13 04-14-2014 08:19 PM
2001 660 won't start timing has jumped Parker General 660 Discussion 12 09-06-2010 11:42 AM
2001 raptor won't start allextremes Raptor 660 Maintenance 9 05-17-2010 10:33 AM

Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome