mack7
New member
- Joined
- Nov 9, 2003
- Messages
- 16
I just did the reed notch mod (what a difference in throttle response!!), while I had the reeds out I noticed that on cylinders 1 and 2 the crank on the right side of each of these, I believe they are crank number 2 and 4, have some blue discoloration to them and I am concerned that something may be getting too hot. The sled runs great with 3800 trouble free miles but could I be running a bit to lean or is this common and nothing to worry about. I appreciate any responses
that could be from the welding that was done on the cranks or when they heated them to put them togather...
, not sure if those are welded....but its from one of the two.
, not sure if those are welded....but its from one of the two.
yamaholic22
Active member
The cranks are not welded, but are heat treated. Every two stroke crank i have seen has some bluish discoloration on it, almost looking like an overheating problem, but it is just a characteristic of the manufacturing process
jwiedmayer
New member
I think the rest of you a right also. If it would have got that hot while riding it would have cooked the bearings and you would have been towed home.
800
New member
You genereally see those blue spots on the crank throws where the rod pin is pressed in the crank wheel. They are like that new. I think when they press the cranks together they heat the wheel at that point to make them go together easier.
yamaholic22
Active member
Yes you are right about the heating when the cranks are put together at the factory