Carb jets
#1
05-16-2009, 11:05 PM
Join Date: May 2009
Location: Andover, Kansas
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Carb jets
On my '90 I have to carry a little bit of choke at in-town speeds. Otherwise the bike "surges" and does not run smoothly. I interpret this as the engine is running too lean and I need to rejet the carburator to richen it up. The bike has a 4 into 2 into 1 exhaust system with a Vance and Hines slip on that was just repacked. Also running a K&N air filter.
What do you think?
Steve-o
Andover, Ks.
What do you think?
Steve-o
Andover, Ks.
#2
05-17-2009, 12:57 AM
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Surging
Hi Steve-O,
What do I think? I think I would do like Dorothy and get the heck out of Kansas... Oz is a better place to be. Now the high desert of Nevada or the high altitude of Colorado would do your CBR some good. Since you "opened up" the breathing of your bike, you need to either move to the above places or rejet the carbs. Easy job on these bikes. Nothing unusual if you have done multis before. If you have a California model like I do, you will just have to mark all the little vacuum hoses to make it easier to put them back on when you are done with your rejet.
Now go get toto and get the heck out of that flat country. Move to Lake Tahoe, CA and don't worry about rejetting the bike.
I would go up 2 sizes on your jetting on both the high and low speed jets.
What do I think? I think I would do like Dorothy and get the heck out of Kansas... Oz is a better place to be. Now the high desert of Nevada or the high altitude of Colorado would do your CBR some good. Since you "opened up" the breathing of your bike, you need to either move to the above places or rejet the carbs. Easy job on these bikes. Nothing unusual if you have done multis before. If you have a California model like I do, you will just have to mark all the little vacuum hoses to make it easier to put them back on when you are done with your rejet.
Now go get toto and get the heck out of that flat country. Move to Lake Tahoe, CA and don't worry about rejetting the bike.
I would go up 2 sizes on your jetting on both the high and low speed jets.
#4
05-18-2009, 09:02 AM
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Steve-O,
I have the full V&H system on my '93. I have installed the Dynojet jet kit and it runs great.
You might start with just cleaning your slow jets in methylene chloride (paint stripper) to remove built up varnish in those jets. I use stock slow jets, 1/2 size up on the mains but the biggest help were the replacement needles in the kit.
I have the full V&H system on my '93. I have installed the Dynojet jet kit and it runs great.
You might start with just cleaning your slow jets in methylene chloride (paint stripper) to remove built up varnish in those jets. I use stock slow jets, 1/2 size up on the mains but the biggest help were the replacement needles in the kit.
#5
05-19-2009, 07:14 AM
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Location: Andover, Kansas
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