Carburetor Jet Tuning - Updates on 1st Post

[lragan]

Yes, Terry, mine are Cobra slash cuts.

[Greg Cothern]

There are 2 types of Cobra Slash Cuts, some with baffles some without.....

[TLRam1]

There are 2 types of Cobra Slash Cuts, some with baffles some without.....

I was doing good till You showed up. 

I didn't realize this, I have only known about the ones with baffles. Kelly and Lawrence, do yours have baffles?

[Lurkin]

I bought my shims and main jets from www.Z1Enterprises.com.  As I recall I paid $17 shipped for 4 105s and a bag of 12 shims.  If you go to their site search for Keihin 99101-393, it will lead you to K&L jets in various sizes.  I didn't see any 108 jets though, just 105, then 110 and up from there.

Rod...

[lragan]

I was doing good till You showed up. 

I didn't realize this, I have only known about the ones with baffles. Kelly and Lawrence, do yours have baffles?

Terry, I am not sure I would know a baffle from a waffle, but if you look into the back of the Cobra slash cut pipes on my bike, you will see a metal "donut" that fits tight against the inside of the pipe.  The hole in the middle is about 1 inch in diameter, and appears to be the end of a smaller pipe.  I really don't know what is behind the donut.

[TLRam1]

Sounds like baffled pipes, I only thought the straights were not baffled. Looking on Cobra's website they only show one exhaust being offered now.

[dgc67]

Baffling situation I would say.  But, if there is a donut I am there!!! 

[KTC]

I believe I'm baffled

[TLRam1]

Lance, I added your post on the first page.

And for others who want to look at re-jetting.

[lragan]

OK, here we go again...

My 2nd '96 will have a K&N filter, and the pipes shown in the picture.  I don't know what they are, but they are about as loud as the slash cut Cobras on Old Blue.

I am happy with the mods on Old Blue, but new boy definitely needs some help!! 

So my questions are three:

1) What are the pipes in the picture?
2) What jets and shims would you guys recommend?
3) Where to get the kit?  Dave Dodge seems to be amoung the missing...

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[roboto65]

Well I "THINK" they might be Hard Chromes my guess anyway and while Bob is playing in Houston he can pick up the Dave Dodge jet kit I have if thats what you are looking for but I would tear into the carbs on her and see if maybe they have been done already!!!

[lragan]

Thanks, Allen.

I have ordered the K&N, and intend to put the bike up on a lift late next week -- I have decided to change the rubber after finding Cycle Gear has a sale on that weekend for both front and rear Perellis for $200!!  I would like to have the kit on hand, as I plan to clean the carbs at the same time. 

The bike stumbles in mid range, and decel pops like crazy, so I doubt the jets have been changed.  It still has the stock air filter on it.  May be the carbs are just grungy, but I doubt it.  Am running a tankful with Seafoam in it now.

If you have time to mail me the kit, I will gladly pay you for it.  If I don't need it, I will pass it along...

Sending you a PM with my address.

[BA]

Terry,

I'll be tuning mine on the dyno at school starting next week as long as the weather holds out.  Before I start I'm going to change the plugs, check the valve clearance, and sync the carbs.  The only mods I have on it are the K&N filter, and two 7/16" diameter holes in the end of each stock pipe.  Last summer Chad helped me install the 105 main jets, and two extra shims on each needle.  I'll keep you updated as I progress through it and make changes as dictated through the A/F ratio in the exhaust gas.

BA

[TLRam1]

BA,

Please do, that will be great information to take a look at.