01 Raptor wont start, no compression. - Yamaha Raptor Forum

» Recent Threads
new to fuel injection
Today 04:12 PM
Last post by morphrider
Today 05:14 PM
2 Replies, 11 Views
Raptor 700 backfiring...
Today 02:40 PM
by K30nyr
Last post by Dunning4life
Today 04:55 PM
4 Replies, 29 Views
Buying a raptor 660?
09-28-2014 03:19 PM
Last post by Mad Dog
Today 04:29 PM
32 Replies, 375 Views
Raptor of the Month...
Today 06:27 AM
Last post by dog86
Today 01:26 PM
6 Replies, 69 Views
Piston weight differences
Today 08:18 AM
by lms1977
Last post by lms1977
Today 11:25 AM
3 Replies, 58 Views
how tight for a axle nut
12-24-2012 01:42 PM
Last post by Cueto
Today 11:25 AM
9 Replies, 928 Views
Hand guards, e- brake??
09-19-2014 09:16 PM
by rwjjr
Last post by rwjjr
Today 11:03 AM
12 Replies, 246 Views
Anyone in Northern Utah
09-29-2014 09:35 AM
Last post by carsonc1974
Today 10:26 AM
2 Replies, 37 Views
Question on Throttle...
09-26-2014 09:13 PM
by ducky
Last post by morphrider
Today 10:10 AM
5 Replies, 99 Views
Power Commander 3 MAP...
Yesterday 09:24 PM
Last post by BigNick98
Today 09:45 AM
3 Replies, 53 Views
» Sponsors
Go Back   Yamaha Raptor Forum > Raptor 660 Categories > General 660 Discussion

Reply
 
LinkBack LinkBack Thread Tools Display Modes
Old 11-28-2006, 06:18 PM   #1 (permalink)
Junior Member
 
Join Date: Nov 2006
Posts: 5
Default 01 Raptor wont start, no compression.

My raptor wont start and when i put it in gear and roll it, i can hear the engine turning over and air comes out of the exhaust but no compression. anybody got any ideas. I was riding my raptor 660 pretty hard when i heard a ting noise come from the engine. The raptor cut off and will not start back up. Only thing i can think of is the timing chain broke or a bent valve. anybody else got any ideas. Thanks brad
kbh3290 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-28-2006, 06:45 PM   #2 (permalink)
Moderator
 
Mad Dog's Avatar
 
Join Date: May 2005
Posts: 16,697
Default Re: 01 Raptor wont start, no compression.

Well let's just hope that if there is something big broken you didn't make it worse by trying to pull start it.

Take the crank nut cover off and throw a socket on there. Pull the spark plug. Slowly rotate the engine over. If it gets hung up it's time to break her down.
__________________
Mike

Mad Dog is online now   Reply With Quote
Old 11-28-2006, 06:49 PM   #3 (permalink)
Junior Member
 
Join Date: Nov 2006
Posts: 5
Default Re: 01 Raptor wont start, no compression.

not what i wanted to hear. the thing about push starting it, it feels like it is in neutral. really easy to push but i can hear the engine turning over.
kbh3290 is offline   Reply With Quote
Old 11-28-2006, 06:54 PM   #4 (permalink)
Moderator
 
Mad Dog's Avatar
 
Join Date: May 2005
Posts: 16,697
Default Re: 01 Raptor wont start, no compression.

Things you could do:

Compression test
Leakdown test (if you get compression)
pull vavle cover and check cam chain and valves
pull whole head and check piston (wouldnt suggest unless you find no compression or can't hold it)
__________________
Mike

Mad Dog is online now   Reply With Quote
Old 11-28-2006, 06:57 PM   #5 (permalink)
Junior Member
 
Join Date: Nov 2006
Posts: 5
Default Re: 01 Raptor wont start, no compression.

sounds like she's got to go to the doctors office for a rebuild...
kbh3290 is offline   Reply With Quote
Old 11-28-2006, 07:06 PM   #6 (permalink)
Moderator
 
Mad Dog's Avatar
 
Join Date: May 2005
Posts: 16,697
Default Re: 01 Raptor wont start, no compression.

It's typically a lot cheaper if you do the troubleshooting and shopping for new parts before you take it in to most places.

How about the starter, does it turn over?
__________________
Mike

Mad Dog is online now   Reply With Quote
Old 11-28-2006, 07:14 PM   #7 (permalink)
Junior Member
 
Join Date: Nov 2006
Posts: 5
Default Re: 01 Raptor wont start, no compression.

yeah sounds like the engine is just turning over and over a little exhaust or air is coming out of the pipe. but i can tell there is no compression.
kbh3290 is offline   Reply With Quote
Old 11-29-2006, 02:15 AM   #8 (permalink)
Senior Member
 
Join Date: Aug 2006
Posts: 320
Default Re: 01 Raptor wont start, no compression.

I would suggest tareing down top end to find out whats wrong on your own. This can be done easyly with basic comon sense,time, reading matrieal like service manule and raptortranny`s tare down guide and the right tools. To take apart and put back togather your basic tools will be 1/4-3/8 ratchets/metric sockets in 1/4-3/8 sizes/ you also need some allen wrenchs with 90degree angle the standerd ones, a keyset and if possiable the ones made to be adapted to ratchet but bits can be used useing 1/4 socket and bit set assortment mainly size 5 and 6. You will also need a extenion or 2 and swivel adaptors all of these tools can be had cheap and dont forget some metric wrenchs , pliers,channle locks/vicegrips/rubber hammer. You wont need any special tools to do all of this and the engine can stay one. You will same a ton money if you take it apart and bag and tag and map all screws. If you dont thank you can put it back togather than let the shop do it cause it should be cheaper if they already knew and had it broke down cause all they got to do is put thangs in and backtogather.

If you decide to take on this job remember to clean around engine so no dust/dirt falls in. Tips: All the allen head bolts make sure dirt is out of them and you tap the allen head bits,wrenchs into the hole with a hammer. Make sure you apply a bit of pressure down to make sure bits dont try to slip and strip. It would`nt hurt to get some pb blaster and spray around some of the screws and let it try to soak a bit before attempting to losen. Once you get it off saram wrap the bottom end soo the conector rod is sealed. You will learn alot and save alot. Dont forget to buy a torque wrench one my fav tools so you dont strip or under tightin anythang. If you need any help at all takeing it apart you will have us here on hand to help 24/7 It`s not hard and someone who knows nothing .just plan and overlook thangs more than twice will be able to do it and save a ton of money. Let us know what happens and what you or the doctor finds.

PS: Dont forget to check everythang behind the side covers like the 1way/clutch and everythang else for ware and tare. It would always be nice to split the case to verfiy all is good but this is something i have not done but do plan on doing when i order my hotrod crank. I know i have literly spent around 100 hrs reading the factory service manlue from small to large repairs and maintance and I still dont like the idea of haveing to spilt the case. But the top end taredown is pretty simple to me and i have done 2 machines so far the past month and it was so much quicker the 2nd time. trust me there is nothing like giveing your raptor some personal love and care and knowing your doing the job right.
akawilliam is offline   Reply With Quote
Old 12-01-2006, 10:39 AM   #9 (permalink)
Senior Member
 
Join Date: Sep 2006
Posts: 343
Default Re: 01 Raptor wont start, no compression.

check your valves before you do anything they may have tightened up.

one other thought is it may be electrical. my stator went bad and all it would do was turn over. but not fire. not sure if this is the same problem you are having or not.
jlraska is offline   Reply With Quote
Old 12-19-2006, 06:59 PM   #10 (permalink)
Junior Member
 
Join Date: Nov 2006
Posts: 5
Default Re: 01 Raptor wont start, no compression.

Took My raptor to the doctor. It had 3 bent valves. (2 exhaust and 1 intake) and the Timing chain broke. What happen is the bolts that hold the one way starter clutch on broke off and the bolt head got between the timing chain sprocket and broke the timming chain. That caused the valves to drop and the piston to hit the valves and bend them. So While i was in the engine I had a new timing chain put in and 3 new valves, went with a wiseco 11.1 piston. hotcam stage 2, hotcams valve spring kit, port and polished the head, dyno jet kit stage 2, and cut the air box open. Went with a fmf powercore slip on. Got the bike back last weekend, let me tell yall, This mf is fast. I am having to learn how to ride it again.
kbh3290 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 05:18 PM.




Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.1
Content Relevant URLs by vBSEO 3.6.1
RaptorForum.com is an independent Yamaha enthusiast website. Content on RaptorForum.com is generated by its users and RaptorForum.com is not in any way affiliated with Yamaha Motor Corporation, U.S.A.
Inactive Reminders By Mished.co.uk and FTP-Anime.com