Would you lean this out?

[4stroker]

My mods:

 

Shaved head

+4 timing

V force 3 reeds

Pro design intake

Keihin 33s

Pods

FMF Fattys

 

Jetting:

 

Pilot: 48, air screw 2 turns out

Needle : CGL middle clip

Main: 165

 

My fuel: 98 RON (93 MON?) pump gas, mixed 25:1 with Silkolene pro comp 2.

 

My combustion chambers:

 

 

My piston crowns:

 

 

This bike is completely stock port and bore. Has run a long time like this and made 50hp on a dyno dynamics dyno. I am reluctant to lean it out but on my RZ motor with same fuel and oil mix there is not nearly as much carbon build up and you can see clearly where the transfers blow on the piston crown. sorry dont have a pic of that.

 

thanks, mark

[Snopczynski]

I CANT TELL MUCH FROM THOSE PHOTOS. HOW DOES IT RUN?

[4stroker]

snop did you click on the thumbnails to see the full size pics? if so what should i get pics of instead?

 

it runs pretty damn good.

[locogato11283]

why didnt you just pull the plugs to check your jetting?

[4stroker]

i had the head off for other reasons and just took pics while i was in there...

[LS1Inferno]

i have 34 PJs with 160s and im ported and mines fine, but hard to tell but do the cylinders feel really smooth like glass? cause they looks a little glazed from the pics like i said hard to tell from a pic. but while you have it apart, id hone it a little and re-ring it. smooth(glazed )cylinders dont hold oil, and its cheap insurance, so you know that didnt cause the problems if you have any in the future.

[Snopczynski]

That worked better. I would say its a little rich, but it depends on how you were running it before it got shut off.

[dajogejr]

If that engine has very much time on it, those pics don't help.

 

You could be lean on the bottom, rich on the top...and lean in the middle for all we know.... It depends WHERE in the jetting circuits you rode... From the pics it looks rich, but if it runs good...leave it.

[J-Madd]

If that engine has very much time on it, those pics don't help.

 

You could be lean on the bottom, rich on the top...and lean in the middle for all we know.... It depends WHERE in the jetting circuits you rode... From the pics it looks rich, but if it runs good...leave it.

 

 

Exactly. I've seen a lot more carbon than that on motors that ran great.

[desertdeweller]

your mix is a little on the fat side you could lean that out some to like 32.1.

[mopar1rules]

guys, i'm going to say that its rich on oil, but lean on gas. i'm not seeing any piston wash, on the piston's crown, by the transfer or exhaust areas. if its rich on gas, then you would have some "clean" patches washed off those areas on the piston crown. the crown is being cooled enough from the fuel and doesn't have the chance to get hot and to burn/carbonize the oil to it. i'd say he's a little on the hairy edge. i know my shee is about 1 main jet size fat, and i have no carbon buildup what so ever on my piston crowns or domes like him (i run 50:1 mix). just some oily mixture, with piston wash on piston crown by the transfer and exhaust ports. 4stroker, what oil/gas ratio are you currently using and what oil brand are you using? just curious.

Edited November 18, 2008 by mopar1rules