Advice based on plug pics

[Steve]

My son's '81 850 has a pipe of unknown origin and a K&N insert in the stock airbox. We have 120 mains and stock pilots in there, I don't remember if I shimmed the needles.

Don't have any pictures of the plugs, but it runs great.

.

[posplayr]

My son's '81 850 has a pipe of unknown origin and a K&N insert in the stock airbox. We have 120 mains and stock pilots in there, I don't remember if I shimmed the needles.

Don't have any pictures of the plugs, but it runs great.

.

So is that with the stock needle? If so he doesnt need to buy the jet kit.

[capnkirk13]

Foiled for the time-being by a stuck lower gang rail screw.

[Steve]

So is that with the stock needle? If so he doesnt need to buy the jet kit.

Yep, stock needle.

My comment was not intended to solicit help with my son's bike, it was intended to show capnkirk what has been done
(and apparently works) on a similarly-equipped '81 850.

.

[posplayr]

Yep, stock needle.

My comment was not intended to solicit help with my son's bike, it was intended to show capnkirk what has been done
(and apparently works) on a similarly-equipped '81 850.

.

I was inferring from your comment that the OP would not need a jet kit; this is in contract to most 1100's that do require a swap to the DJ needle.

[capnkirk13]

Notice the lack of small o-rings next to the small brass riser on the middle two carbs? Is this normal? I would assume not.


And yea...I'm a little p!$$3d about those three fubar'd screws.

[TheCafeKid]

My son's '81 850 has a pipe of unknown origin and a K&N insert in the stock airbox. We have 120 mains and stock pilots in there, I don't remember if I shimmed the needles.

Don't have any pictures of the plugs, but it runs great.

.

BTW Steve, your sons pipe is in fact a Jardine. Terry has its twin in his garage right now...

[Captainkirk]

Use a carbide zip wheel to cut a slot in the screw head. A large standard will walk those screws right out of there.

[capnkirk13]

Yea...unfortunately all my air tools including cutting wheel are at my other place. Won't happen tonight.

[Steve]

BTW Steve, your sons pipe is in fact a Jardine. Terry has its twin in his garage right now...

Thanks.

It's nice to finally know what it is.

.

[blowerbike]

Thanks.

It's nice to finally know what it is.

.

nope...not me.
i traded it for a bologna samich tonight...YUM!

[TheCafeKid]

Use a carbide zip wheel to cut a slot in the screw head. A large standard will walk those screws right out of there.

Or you could use the propper JIS screwdrivers on them and never have this problem again

[boingk]

Meh, convert the lot to stainless for about $5. You'll wonder why you never did it before.

Anyway, the 120 jetting for pipe and K&N filter sounds about right. The stock airbox on these is very restrictive, but also makes the engine very smooth. I ran pods on mine with a 4-1 exhaust. Jetting ended up with 140 mains; about a 20% increase over stock.

Cheers - boingk

[capnkirk13]

Or you could use the propper JIS screwdrivers on them and never have this problem again

I'm pretty sure I used the right driver as the rest came out fine. The PO had already screwed these up (pun intended). I just got the bike and will be replacing as much of these philips with stainless allen as possible.