F
frog
Well-known member
Finally finished my 860 just this past Wed, just in time for Christmas.
Nothing too special but just more of updating and addressing all the issues assiocated with the 07 Summits.
First was to get rid of the challenger lite track and install a 2.25 powdermax track with a set of smitty's drop brackets.
Next I got rid of the stock XRS seat and installed the new Boss seat with a million zippers, awesome seat.
Then I got rid of the yellow and blue as well as the stock hood that was cracked and went with a blue and black color, more appealing to me and added the white number plates on the sides as well as the sled head racing stickers.
Finally the engine was removed and after talking with Big John at sled head racing we decided to send the cases out to be checked for proper tolerances and found that they were in fact too tight (common issue with all 07 800r engines) so the proper machining was done.
We then checked the crank and found that the PTO end was .010 out, the venter was .008 and the mag was .006 out. The two PTO end bearings were in pretty rough shape with only 1200 miles so the decision was made to replace the 2 end bearings and the crank was then trued, PTO, center and mag.
To compliment the work on the bottom end the primary was sent out and balanced to prevent any unnecessary stress on the crank.
Now that the bottom end was complete next we focused on the cylinders. We decided on a 860 set that was more mountain specific for porting since that is where the sled will be ridden the most although it will be ridden around here in MN a little as well as used for the hill drags. The top was assembled with the cast dual ring 860 pistons and a 13-1 RK-tek was installed for 91-92pump fuel here in MN for break-in and then will be changed out for a higher compression for the hills when I go.
Lastly I decided on the straightline Y-pipe, quick clickers, mbrp can and also a team secondary to finish everything out.
I think that all potential isssues were addressed and want to thank Big John for all the parts and help.
Pics are kinda poor cause it's snowing like a bich outside so I shot them in my garage. Will ride it tomorrow for break-in and then will do some clutch tuning on Sun.
-Frog
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Nothing too special but just more of updating and addressing all the issues assiocated with the 07 Summits.
First was to get rid of the challenger lite track and install a 2.25 powdermax track with a set of smitty's drop brackets.
Next I got rid of the stock XRS seat and installed the new Boss seat with a million zippers, awesome seat.
Then I got rid of the yellow and blue as well as the stock hood that was cracked and went with a blue and black color, more appealing to me and added the white number plates on the sides as well as the sled head racing stickers.
Finally the engine was removed and after talking with Big John at sled head racing we decided to send the cases out to be checked for proper tolerances and found that they were in fact too tight (common issue with all 07 800r engines) so the proper machining was done.
We then checked the crank and found that the PTO end was .010 out, the venter was .008 and the mag was .006 out. The two PTO end bearings were in pretty rough shape with only 1200 miles so the decision was made to replace the 2 end bearings and the crank was then trued, PTO, center and mag.
To compliment the work on the bottom end the primary was sent out and balanced to prevent any unnecessary stress on the crank.
Now that the bottom end was complete next we focused on the cylinders. We decided on a 860 set that was more mountain specific for porting since that is where the sled will be ridden the most although it will be ridden around here in MN a little as well as used for the hill drags. The top was assembled with the cast dual ring 860 pistons and a 13-1 RK-tek was installed for 91-92pump fuel here in MN for break-in and then will be changed out for a higher compression for the hills when I go.
Lastly I decided on the straightline Y-pipe, quick clickers, mbrp can and also a team secondary to finish everything out.
I think that all potential isssues were addressed and want to thank Big John for all the parts and help.
Pics are kinda poor cause it's snowing like a bich outside so I shot them in my garage. Will ride it tomorrow for break-in and then will do some clutch tuning on Sun.
-Frog
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