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04-25-2006, 08:48 PM
| #1 (permalink) |
| 2nd Gear Member  Join Date: May 2005 Location: Arkansas
Posts: 461
My Mood:  |  Found out why it wont run...
Well I finnaly got to tear my ttr down today and this is what I found  all of the rings were fine, the cylinder wasnt scarred. I got out the micrometer and checked everything, the piston was within the limits of the stock 90 piston, the cylinder was also within the limits. The only thing about this that wasnt "normal" was that I decided to use MototuneUSA's procedure for breaking in the motor, and now I have a broken piston. good call. |
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04-25-2006, 09:09 PM
| #2 (permalink) |
| 1st Gear Member Join Date: Apr 2005
Posts: 214
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bummer man, well at least your cylinder isnt scarred up. anyone else have any bad experiences with this method of break in?
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04-25-2006, 09:38 PM
| #3 (permalink) |
| 3rd Gear Member  Join Date: Dec 2003 Location: San Diego
Posts: 2,330
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worked well for me for 2 motors
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04-26-2006, 09:05 AM
| #4 (permalink) |
| 2nd Gear Member Join Date: May 2005 Location: Arkansas
Posts: 461
My Mood: |
im going to send the piston back to yamaha and see if they will send me a new one. They should, the motor only ran for about 30 mins before it blew. Im hoping it is just a bad piston and not a problem with my setup.
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04-26-2006, 09:13 AM
| #5 (permalink) |
| 1st Gear Member  Join Date: Nov 2005
Posts: 216
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I've used the mototune method on 4-5 different motors with no issues at all. Most important part of the equation....engine at operating temp; i.e. all the way warmed up and ready to go. |
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