boring?

[98-warrior]

okay a few months ago i got my je 366 and sent the head to the small engine shop. he said i needed to pring the piston in so he could finish it up. i did and got it all back together.. and you have to chrome the sleeve right? it looked like he just honed it after he bored it. so im just makin sure you chrome the sleeves on 4 strokes? i will be really mad if he said he didnt cause i got it all put back together.

 

[ld]

No chroming. Never heard of doing that. Bore then hone is correct.

 

[buzzy613]

no its just got to be honed to seat the rings

 

[98-warrior]

oh ok cause i know for sure ur supposed to chrome two strokes.

 

[87warrior917]

oh ok cause i know for sure ur supposed to chrome two strokes.

I dont know much about 2 smokes but 4 strokes you bore and hone, put it together and rip up the earth

 

[buzzy613]

no, if a 2stroke has the nikasil coating it can be recoated, or its the cast iron sleev like the warrior

 

[98-warrior]

ok well good but 2 dirt bike repairs in town send the 2 stroke jugs to get chromed.

 

[DeadLastRacing]

no, if a 2stroke has the nikasil coating it can be recoated, or its the cast iron sleev like the warrior

Yupp, Re-Nick is for 2 strokes. Never heard of a chroming of the inside of the cylinder?

 

[beastlywarrior228]

ive never heard of chroming a cylinder

 

[elwood]

old 2 smokes had crome sleeves and wernt supposed to be bored out like my cr250, but they can be resleeved with a standard sleeve so you can bore them out. That is what was done for me

 

[buzzy613]

Yupp, Re-Nick is for 2 strokes. Never heard of a chroming of the inside of the cylinder?

im with ya on that one

 

[MotoArts]

IIRC, nikasil/chrome bores were used for their superior heat transfer properties compared an iron liner. And since the chrome was much harder and scratch resistant than the piston/rings, if the bike did injest some nasties the piston was "supposed" to be the sacrificial lamb. If you were unlucky enough to scratch the jug, it was recommended to be replaced (mo' $$$ for the manufacturers). Resleeving was/is the short road home for the regular guy on a beer budget and allows serviceability that chrome doesn't give.