I got my motor parts back from TRINITY (trick work!) and I had no problems installing everything. It was a 2 person job to slide the cylinder over the piston (used a hose clamp for the rings and 2 pieces of wood under the piston to keep it from going down into the case) The cam gear took a helping hand as well. After a few hours of work the 686 started on the first shot with 180/185 mains with needle in 4th slot. I did the cam break-in and will do the rest of the break-in this weekend! Thanks Harry, Raptor720, and the other atvconnection members here who helped me with my 686 questions. It is going to be torture putting around during break-in!!! I will let you all know my final setup and results.

Later. [img]i/expressions/face-icon-small-happy.gif[/img]

 

Blue leader.

I have a lot of experience tearing down 2 stroke engines heads and cylinders and putting them back together. My question is. How much harder is it to do a 4 stroke? Can a halfway knowledgeable backyard mechanic, with the help of the Yamaha service manual, tear down and reinstall the Raptor as you did for this kit? TIA

 

The difference between 2 stroke and 4 as far as rebuilds is the head and setting the cam timing. Everything else is the same. I have rebuilt sleds and a 16-valve 4-cylinder bike engine. I didn't really find it that much harder. If you follow the shop manual and take your time, it should be no big deal. So go for it[img]i/expressions/face-icon-small-happy.gif[/img][img]i/expressions/face-icon-small-cool.gif[/img]

 

Good advise airraptor. My brother has had his DS head off and cams. If he can do it I should be able to as well. I can read and follow instructions. [img]i/expressions/face-icon-small-smile.gif[/img] Thanks for the tips.

 

How long did trinity have your motor?

 

Congrats blueleader! You should be happy. If not you are hard to please.[img]i/expressions/face-icon-small-smile.gif[/img]Double check the torque on the head gasket. The local shop muffed the first one. I have seen one or two post on others saying the same thing.

 

Congrats!, it's nice to see others stepping up to the plate.[img]i/expressions/face-icon-small-cool.gif[/img]

 

I know the cam sprocket was the toughest part for me, I didnt have a second pair of hands available. trinity does a good job.
wshrdskin: its not that difficult, just takes a bit of time, service manual, and if you have someone to help it goes a lot quicker

 

TRINITY had my parts for 3-4 weeks.
My quality Armstrong torque wrenches where helpful.
2 sets of hands for the cam sprocket makes things easy.

King, I won't be the fastest in the group for too long. People are pissed (jealous) and are setting aside the time to tear-down, mail to Harry, and install 686's on their Raptors!!!!!!

Now I get to fumble with jetting all over again [img]i/expressions/face-icon-small-frown.gif[/img]