Your jets should be #105 and #110, for some reason the rear jet is always larger, check your oil level and don't screw the dip stick in when checking.

http://www.mrcycles.com/fiche_secti...n_detail.asp?section=178530&category=MOTORCYCLES&make=HONDA&year=1998&fveh=4047

 

What color of smoke are you getting, Black, Gray, White, or Blue? And what does the exhaust smell like?

 

The rear cylinder generally runs a little hotter since its coolant (and air flow) comes from the front cylinder. If both jets were the same, the rear cylinder would be running too lean. The rear cylinder is usually a few jet sizes larger.

Other bikes (like my 1986 Shadow), however, have split paths for the coolant. This means that the two cylinders should run very close to the same temperature, and both jets are the same size.

If your bike has a crossover pipe for the coolant between the jugs, your rear cylinder and front cylinder will usually have different jets, with the rear just a littler larger.

--Justin

 

Thanks for all the information. The smoke looks white to me which led me to believe that it was burning oil but like I said I just went for the jets first because the guy told me it didn't start smoking until after the rejet. So what else could be the problem? Like I said it is running fine not skipping or missing any just the smoke. Any suggestions as to how I could fix the problem would be great. thanks again.

 

Thanks for all the information. The smoke looks white to me which led me to believe that it was burning oil but like I said I just went for the jets first because the guy told me it didn't start smoking until after the rejet. So what else could be the problem? Like I said it is running fine not skipping or missing any just the smoke. Any suggestions as to how I could fix the problem would be great. thanks again.

 

I meant to add too that it is not burning any oil. I check the oil after every ride and it is always at the same level. Also the oil does not look or smell burnt.

 

Does the white smoke smell sweet, like burned sugar?

Check your coolant level. (Both in the overflow jug and in the radiator itself. Engine cold, of course.)

White smoke, is sometimes coolant. If you're losing coolant, that's a bad thing, since it is often a bad head gasket or cracked cylinder wall.

How much white smoke? A little puff, or a smokescreen cloud?

Does the smoke only happen when it's cold, or does it do it when it's all warmed up too? I ask because that white smoke could just be water vapor. Picture your car running on a cold winter morning.... When the bike was rejetted, more fuel goes into it, so more water vapor out. My bike does that. One pipe smokes more than the other also. The pipes are different lengths, so more vapor makes it out of one than the other.

Best to figure out what it is before you ride too much more, in case it's a mechanical problem.

--Justin

 

I guess the smoke could be vapor. When I first bought the bike it didn't hardly ever smoke but when I was riding down through the city the other day (25-30mph and many stoplights) I noticed it smoking a little more while sitting at the stoplights. Still not pouring smoke but just noticed it coming out of the tailpipe and blowing in front of me. I will check the coolant in the overflow and the radiator tonight. Also if it was a blown headgasket wouldn't the oil have looked milky when I changed it last week? Just wondering. Thanks again

 

It would depend on where the leak was if the oil would get water in it just like it depends on where it at to get water in the cylinder, if it is leaking compression into the coolant you will see air bubbles at the radiator fill neck with the cap off. If it is leaking into the cooling system the engine will probably have to come out, I'm not sure but I don't think you can pull the heads while it's in the bike.

 

Ok so I cleaned everything on the carburetors and put it back together. Everything went together fine and I also adjusted the idle screws to 3 and 1/4 turns out. The bike still runs good but still idles too high and smokes a little. I have turned the throttle stop all the way out until it is just barely touching the throttle valve and it is still idling too high. Also I noticed while listening to the bike that the front cylinder sounded like it was hitting harder than the rear. The rear sounded kind of raspy. The bike has drag pipes on it but shouldn't both cylinders sound basically the same?

 

There's an adjuster at the twist throttle make sure it's has a 1/16 free play, make sure all the cables have free play, by now your carbs have to be out of adjustment so you need to get that done, as far as the pipes sounding the same IF both were the same length and IF the carbs were adjusted the same they would sound pretty close,,,other wise no.