Strange Problem at Highway Speed
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Extreme HDF Member
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From: Edmond, OK
Originally Posted by texashillcountry
Do you know what jets you have now?
I've got spares if you need them.
I've got spares if you need them.
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From: Edmond, OK
So pulled the bowl off today and changed the jets out. On the bike was a .74 main and stamp on the intermediate is a 31. I put in a .72 and the 295 intermediate. Took it out on the highway and it runs exactly the same. Steady acceleration at part throttle but full throttle is cutting in and out and jumping. Do I need to go even leaner on the main?
Dirt don't hurt
Joined: Jan 2011
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From: Haslet Texas
So pulled the bowl off today and changed the jets out. On the bike was a .74 main and stamp on the intermediate is a 31. I put in a .72 and the 295 intermediate. Took it out on the highway and it runs exactly the same. Steady acceleration at part throttle but full throttle is cutting in and out and jumping. Do I need to go even leaner on the main?
Your jets are good make sure the passages are clean.
I doubt it's your problem but look at that little rubber accordion thing the accelerator pump rod runs through.
I had a problem with mine but it caused problems at idle not wot but it's worth checking.
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Extreme HDF Member
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From: Edmond, OK
Originally Posted by texashillcountry
31 &74 are what I'm running in my 111.
Your jets are good make sure the passages are clean.
I doubt it's your problem but look at that little rubber accordion thing the accelerator pump rod runs through.
I had a problem with mine but it caused problems at idle not wot but it's worth checking.
Your jets are good make sure the passages are clean.
I doubt it's your problem but look at that little rubber accordion thing the accelerator pump rod runs through.
I had a problem with mine but it caused problems at idle not wot but it's worth checking.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
You aren't running a fuel filter are you?
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Extreme HDF Member
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From: Edmond, OK
Originally Posted by texashillcountry
Make sure you spray some carb cleaner through the air bleed as well,
You aren't running a fuel filter are you?
You aren't running a fuel filter are you?
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Joined: Mar 2010
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From: Poolville
So after riding the bike all week after getting everything adjusted it rode pretty good. I only found one problem is. If the throttle is pinned all the way then it starts cutting out and not gaining speed. If I back off just a c*nt hair then it stops cutting out and starts gaining speed again. Is this a main jet being too rich issue or possibly throttle adjustment issue? This happens at 70+ mph.
By the above statement and the fact that you are not sure what is in the motor I would try a .076 for the main jet. The fact is, at wide open throttle your sputtering but if you back off the throttle decreasing the amount of inlet air a little it smooths out. You see by backing off the throttle a tad you're changing the fuel mixture to less air with the same amount of fuel making the mixture richer. So if you want to run wide open throttle you going to need more fuel. I think you should go up in jets not down..
Last edited by 98hotrodfatboy; Jun 15, 2019 at 08:41 PM.
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Extreme HDF Member
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From: Edmond, OK
Originally Posted by 98hotrodfatboy
I'm pretty sure your going the wrong way with the Jets.
By the above statement and the fact that you are not sure what is in the motor I would try a .076 for the main jet.
The fact is at wot your sputtering but if you back off the throttle (decreasing the amount of inlet air) a little it smooths out. You see by backing off the throttle a tad your changing the fuel mixture to less air with the same amount of fuel (making the mixture richer) so if you want to run wot your gonna need more fuel...
By the above statement and the fact that you are not sure what is in the motor I would try a .076 for the main jet.
The fact is at wot your sputtering but if you back off the throttle (decreasing the amount of inlet air) a little it smooths out. You see by backing off the throttle a tad your changing the fuel mixture to less air with the same amount of fuel (making the mixture richer) so if you want to run wot your gonna need more fuel...
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
I'm pretty sure your going the wrong way with the Jets.
By the above statement and the fact that you are not sure what is in the motor I would try a .076 for the main jet. The fact is, at wide open throttle your sputtering but if you back off the throttle decreasing the amount of inlet air a little it smooths out. You see by backing off the throttle a tad you're changing the fuel mixture to less air with the same amount of fuel making the mixture richer. So if you want to run wide open throttle you going to need more fuel. I think you should go up in jets not down..
By the above statement and the fact that you are not sure what is in the motor I would try a .076 for the main jet. The fact is, at wide open throttle your sputtering but if you back off the throttle decreasing the amount of inlet air a little it smooths out. You see by backing off the throttle a tad you're changing the fuel mixture to less air with the same amount of fuel making the mixture richer. So if you want to run wide open throttle you going to need more fuel. I think you should go up in jets not down..
No way man.
There must be something else going on here but I'm not sure what.
