Got some parts and Questions

[JRN2786]

Picked up a new to (to me) 416 cylinder and a 87mm 10.8:1 JE piston for $100 I have to replace my base gastket so I figure ill bolt this up when I'm done. My question is should I use permetex or rtv on the gaskets when I put it together or just use the gaskets? Also will 93 octane be enough to run in it? Thanks

[CJM]

Dont use rtv, just the gaskets.

93 should be fine once jetted correctly.

[JRN2786]

Cool. And thanks. Will jetting need to be richer with 19 more cc's? I'm

[CJM]

yes, you will need to rejet.

This is a good basis to start with: http://www.exriders.com/vbb/showthread.php?s=&threadid=445695&highlight=jetting+placement

[JRN2786]

So with a slip on, a uni filter with lid on I should start around 170 main and 42 pilot? And the needle on the 2nd notch down? Sorry for all the questions I had my jets picked out then I got this 416 stuff so now I'm lost

[honda400ex2003]

yes you should start with that jetting. maybe a 172 instead just to make sure you are running a bit rich before getting on it hard.

steve

[JRN2786]

What's putting the needle on the second notch from the top do? I noticed in that thread in only recommend it on 416cc's

[JRN2786]

i'm guessing the sparks timing key will not work well with almost 11:1 compression.

[honda400ex2003]

nah, probably not even with 100 octane.

i will do some experimenting of my own this summer with all of them but i doubt it will work without 110. check out wheelies thread for exact info on what to run with what setup.

steve

[JRN2786]

Umm... Cant find the thread. But thanks for an answer.

[honda400ex2003]

sorry i guess it was easier to find.

my suggestion 3 degree 100 octane, 6 degree 110 with 11:1 octane.

just how i would do it if it was my machine.

steve