New owner question
Thread Starter
Junior Member
Squid
Joined: May 2011
Posts: 2
From: Flatwoods, KY
New owner question
I've been searching on this for a while now, and can't seem to find a close enough post.
I bought a 98 superhawk with 14K on it,
seller only put 800 miles on it in the last 3 years.
Heres my issue, when crusing between 3k & 4K rpms, it starts caughing through the carbs, til I either give it some fuel or let off completly.
I have changed the plugs, (had one that was correct and one that was a mismatch) and changed the oil, I have not had the tank off yet.
Other than that it runs pretty good.
I bought a 98 superhawk with 14K on it,
seller only put 800 miles on it in the last 3 years.
Heres my issue, when crusing between 3k & 4K rpms, it starts caughing through the carbs, til I either give it some fuel or let off completly.
I have changed the plugs, (had one that was correct and one that was a mismatch) and changed the oil, I have not had the tank off yet.
Other than that it runs pretty good.
Junior Member
Squid
Joined: Apr 2011
Posts: 18
From: San Diego
I am having the same problem. I notice it mostly when its cold. I plan on taking the carbs out and cleaning them this week, to see if that fixes it.
If you come up with a solution, please post it, too
If you come up with a solution, please post it, too
Mid-level Member
Superstock
Joined: Dec 2004
Posts: 268
From: Chicago
sounds like the bike is stock, so probably doesn't have a badly tuned jet kit to get right.
--fred
Thread Starter
Junior Member
Squid
Joined: May 2011
Posts: 2
From: Flatwoods, KY
Well since starting this post, I have not been able to run any cleaner through it, due to lack of dry weather.
Also my bike has a set of two brothers pipes on it, other than that its stock.
Also my bike has a set of two brothers pipes on it, other than that its stock.
Senior Member
MotoGP
Joined: Jul 2007
Posts: 5,066
From: NYC
I gotta believe that we all are getting more of this because of the plummeting gas quality. They are rapidly making the stuff undrinkable for our giant carbs. I have been noticing it more & more on both my hawks and have read about how poor the gas is. I will yank the carbs & clean them but I really believe gas quality is partly to blame.
Senior Member
Superstock
Joined: Jan 2011
Posts: 258
From: Santa Clara, CA
I gotta believe that we all are getting more of this because of the plummeting gas quality. They are rapidly making the stuff undrinkable for our giant carbs. I have been noticing it more & more on both my hawks and have read about how poor the gas is. I will yank the carbs & clean them but I really believe gas quality is partly to blame.
There's no doubt that it all is crapping out; higher ethanol, dirtier pumps, what-have you. It's all terrible. I have considered going to the airport for gas because you'd be damn sure it's clean there. And as I might start to work at one that seems pretty good!
Something to bear in mind though, if you're using outdated o-rings, that can cause a lot of problems. I always use viton o-rings and make my own gaskets with viton because it resists all the crap that's in there.
I had to pull off an '86 GSX750R carbs 3x times because the owner didn't wanna cough up for nicer stuff. What's better, spending an extra $15 on o-rings, or $180 labor and $15 parts once you realize it goes to crap soon enough?
+1 on the few tanks deal, it always is nice to get some really fresh gas going through the carbs.
Junior Member
Squid
Joined: Apr 2011
Posts: 18
From: San Diego
Well, I cleaned the carbs last night.
>The first thing I did was pull all the hoses off the tank, and petcock without labeling them..... hope I go them back on right.
> the next thing I did was take the airbox off, and realized I need to swap out the phillips screws with allen heads ( did that [m4x16]) and washers.
> I pulled the carbs of, and cracked the choke cable plastic thread insert ( where the cable goes into the carb body
)
> I take out the pilot jets, #45. and cant see any light through them. So, I take a sewing needle, and poke out the varnish, and shoot it with brake cleaner until fluid shoots out smoothly
> I button up the carbs, and take off the lid of the rear carb, and make sure the diaphram isn't ripped. all good.
> do the TPS adjustment ( slotted the rivets with a dremmel, replace with allenheads.) ( was 975 ohms, now 503 ohms)
> put it all back together, and it wont start...... lift the tank and move the vacuum line to the right place on the petcock.
> i took it for a ride, and every time I stop, the idle his at 2k, I reach down, and adjust idle screw. stop again, and the idle is climbing...... what did I do wrong?
I also found that the previous owner didn't put in the exhaust gaskets on his slip-on TBR pipes, so I had air leaking out of the pipe in a few places.
I found the original pipes, and reused the gaskets from the stock set.
>The first thing I did was pull all the hoses off the tank, and petcock without labeling them..... hope I go them back on right.
> the next thing I did was take the airbox off, and realized I need to swap out the phillips screws with allen heads ( did that [m4x16]) and washers.
> I pulled the carbs of, and cracked the choke cable plastic thread insert ( where the cable goes into the carb body
)> I take out the pilot jets, #45. and cant see any light through them. So, I take a sewing needle, and poke out the varnish, and shoot it with brake cleaner until fluid shoots out smoothly
> I button up the carbs, and take off the lid of the rear carb, and make sure the diaphram isn't ripped. all good.
> do the TPS adjustment ( slotted the rivets with a dremmel, replace with allenheads.) ( was 975 ohms, now 503 ohms)
> put it all back together, and it wont start...... lift the tank and move the vacuum line to the right place on the petcock.
> i took it for a ride, and every time I stop, the idle his at 2k, I reach down, and adjust idle screw. stop again, and the idle is climbing...... what did I do wrong?
I also found that the previous owner didn't put in the exhaust gaskets on his slip-on TBR pipes, so I had air leaking out of the pipe in a few places.
I found the original pipes, and reused the gaskets from the stock set.
Last edited by ratz; May 26, 2011 at 08:02 PM.
Junior Member
Squid
Joined: Apr 2011
Posts: 18
From: San Diego
I finally broke down and took the SH to a race shop. They sync'd the carbs ( and also found my choke cable wasn't seated properly) after paying $75. for the carb sync, it no longer has the carb farts, and I have no problems in the 2-3k rpm range.
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