LM V jetting

[dxhall]

The 1990 LeMans V came with small pod filters, but in the box of parts was a complete stock air box.  I put the stock box back on with a KN filter this winter and test ran the bike today.  It is way lean, which I guess says something about the efficiency of pod filters.  Current jetting is a number 50 slide, K33 needles in the fourth lowest groove, 150 main jets.  Does anyone know the stock setup for this bike?  With this setup and the stock box, it wouldn’t rev past 5500 and turned the plugs white.

[wirespokes]

That makes no sense. Are you saying the stock filter flows MORE air than the K&Ns? If the stock airbox is more restrictive, that would mean less air which equates to a rich mixture.

Stock was:
K33 Needle
145 Needle jet
62 Idle jet
50/3 slide
260 Atomizer

Ed Milich recommends:
K4 Needle
128 Needle Jet
68 Idle Jet
50/3 Slide
265 Atomizer

His recommendations work very well, I've gone with them. But I don't know how they'll work with the stock filter - I'm running K&Ns.

[dxhall]

The stock box with the KN filter must flow more.  The old pods were KNs, but were very small to fit between the carb and the battery.  The stock box also draws air through an intake runner under the tank, so it should draw cold air.  The pods draw air from behind the cylinder, which should be warmer.  It is also possible that the space behind the cylinders is a low pressure area, where the intake under the tank probably gets some ram effect.

[Idontwantapickle]

The 1990 LeMans V came with small pod filters, but in the box of parts was a complete stock air box.  I put the stock box back on with a KN filter this winter and test ran the bike today.  It is way lean, which I guess says something about the efficiency of pod filters.  Current jetting is a number 50 slide, K33 needles in the fourth lowest groove, 150 main jets.  Does anyone know the stock setup for this bike?  With this setup and the stock box, it wouldn�t rev past 5500 and turned the plugs white.

I worked on those bike new, the stock jetting is crap!

My LeMans 1000 has stock airbox and runs like a scalded dog jetted as follows:

50/3 slide
K4 needle in the middle
AB265 Atomizer (needle jet)
65 pilot
128 main

Don't forget to replace those old enricher plungers and check the cables.

Clean and rebuild the carbs if you have any doubt about their condition.

There are several threads on this board like this one: http://wildguzzi.com/forum/index.php?topic=78619.0

YMMV, be prepared to tweak it a bit but that should be close.

Hunter

[dxhall]

Thanks all.  Just sent the order to Bevel Heaven.   The Milich jets and needles should be here in a couple days.

[Old Jock]

I have a bit of software that gives main jet equivalents, but I'm too stupid to understand what it's telling me

Perhaps later I'll post a separate thread on it to see if others who are brighter (not difficult) can figure it and help me

I too have went with Ed's recommendations this year for pilot and main, but in Europe I think we got different slides, bike has yet to fire with them

John

[radguzzi]

I don't see any mention of the exhaust. 

My '89 used the stock airbox and the Euro jetting, I would have to look it up but these guys have it covered.  Mine also wore a Rennsport full exhaust...  what a boomer...!

Best,
Rob

[guzzisteve]

I found that a needle for the Cali2 is the same taper as the K33, just a longer needle. What this does is move the whole tuning area down into the atomizer and you get better fuel consumption.  It kind of trims the fuel cause it's not the same stuff as EU fuel. I also used a #60 choke jet so your plugs don't get so black.