Cylinder off to cv tech

[Brock]

cylinder needs to be redone and some welding . Good thing I have a few of them . It's summer, so time to do the mods

 

[rabbi]

Are those the original hone marks?

 

[Brock]

No, was and is a ported cylinder

 

[Powaton]

Crack between finger port and main exhaust port?

 

[Brock]

Yes

 

[big tom]

Brock, do you port your own cylinders or do you send them out?.
Why do you think it cracked?. Heat and opening the ports up?.

 

[Brock]

This cylinder was ported for me . It's thin in that area as you can see . Cv tech is fixing this. Not usual in the Polaris, but it's been ported. The 800 e tecs are even thinner from exhaust to transfer and they fix them .

 

[Dr.Notadoo]

I've seen stock cylinders crack there as well, it's not uncommon as mentioned

 

[Powaton]

Does a crack like this cause a burn down or other running symptoms?

 

[Brock]

Does a crack like this cause a burn down or other running symptoms?

The crack would have caught the ring and you know the results of that .

It's the price we pay for mods, porting and heat influencing.