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Emergency

  • Thread starter Thread starter lovetoride
  • Start date Start date
L

lovetoride

Guest
Anybody that could help i could really use it fast. I have a motorcycle skills test in the morning, so i need to get this fixed fast. After taking my bike out for a ride today and touching up some paint on it i decided to take it out again. I was riding about 10miles an hour and the bike revs up to 6,000 rpm's. It did it twice and the only way to stop it was to turn the bike off. Please help.

Thanks
 
I just found out that the bike is reving high when the choke is engaged. Do you think it is carb related?
 
Put bike on centerstand in neutral and see if you can get this behavior to show itself as you fiddle with handlebar/throttle.
 
The choke adds in fuel so yea, it will rev high when already warm. Why is it on right now? Is this the first time you started it up today? What happens when you shut off the choke? Is the throttle cable hung up anywhere?
 
lovetoride said:
I just found out that the bike is reving high when the choke is engaged. Do you think it is carb related?
Click to expand...
If it's revving when the "choke" is engaged, then dis-engage the "choke".
shrug2.gif


If the bike is still cold enough to be using the "choke", you don't want to be doing a skills test with it.
You probably don't want to be practicing your skills test, either.

Not sure what bike you have (it's not in your profile, hint, hint), but on some bikes, the clutch cable passes between the intake tubes for carbs 1 and 2. There should be some retention device there to keep the cable away from the throttle linkage. If that device is missing, the cable can get tangled in the throttle.

.
 
lovetoride said:
I just found out that the bike is reving high when the choke is engaged. Do you think it is carb related?
Click to expand...
With "choke" on, it will rev high, but with clutch out and load on engine, it shouldn't hit 6k. My bike will stumble if I try to rev it with "choke" on as I move thru gears.
 
Steve said:
If it's revving when the "choke" is engaged, then dis-engage the "choke".
shrug2.gif
Click to expand...

Yes, this.

cowboyup3371 said:
The choke adds in fuel so yea, it will rev high when already warm.
Click to expand...

The choke adds an enriched air/fuel mixture; the air is what causes the RPMs to rise once the cylinder is warm enough for complete combustion. But the bike will still be hot immediately after you shut it off so I wouldn't expect you to leave the choke on and just shut off, restart, and have idle return to normal.

I never let mine get above 3k on choke. Not sure exactly what it would do if I didn't start turning it down before then. 6k does seem quite high. What is your "normal" idle? Should be between 1000-1200 RPM. Have you sync'd your carbs recently?

If your bike won't run after warming up a minute without the choke, then your carbs need cleaning and adjustment because you're lean.
 
Hi,

I assume we are talking about your '83 Katana 650G. It's not polite to make us look back through your old posts to find out.

You're not supposed to run with the choke on all the time. If you have to run with the choke on all the time then you must fix your bike.

Have you properly completed all of the required maintenance on your 30 year old motorcycle?

Your symptom could be caused by several conditions; stuck throttle cable (take it out and lube it, check for kinks in the route where it might get stuck, etc), air intake leaks (see: Air Intake Repair), stuck choke plungers (see: Mikuni BS(CV) Carburetor Rebuild Tutorial), etc. Have you adjusted the valves (see: Valve Adjustments (8 Valve)? Have you tested and serviced the charging system (see: the Stator Papers)? And that's just the start of it. See also your "mega-welcome".

Good luck on your test.


Thank you for your indulgence,

BassCliff
 
Last edited:
Yes, We are talking about a 83 Katana 650. I only use the choke in when i first start the bike for a few minutes, then i turn it off.

I do not know if all the 30+ year maintenance has been done because i just purchased the bike from a friend who had only has it for 2 years. He did not do all that work that you have listed.

BassCliff said:
Hi,


I assume we are talking about your '83 Katana 650G. It's not polite to make us look back through your old posts to find out.

You're not supposed to run with the choke on all the time. If you have to run with the choke on all the time then you must fix your bike.

Have you properly completed all of the required maintenance on your 30 year old motorcycle?

Your symptom could be caused by several conditions; stuck throttle cable (take it out and lube it, check for kinks in the route where it might get stuck, etc), air intake leaks (see: Air Intake Repair), stuck choke plungers (see: Mikuni BS(CV) Carburetor Rebuild Tutorial), etc. Have you adjusted the valves (see: Valve Adjustments (8 Valve)? Have you tested and serviced the charging system (see: the Stator Papers)? And that's just the start of it. See also your "mega-welcome".

Good luck on your test.


Thank you for your indulgence,

BassCliff
Click to expand...
 
lovetoride said:
Yes, We are talking about a 83 Katana 650. I only use the choke in when i first start the bike for a few minutes, then i turn it off.
Click to expand...
If you have to use it "for a few minutes", you need to adjust your carbs, probably after cleaning them and replacing the o-rings.

I can ride any of the bikes in my stable within 30 seconds of firing them up. :D


lovetoride said:
I do not know if all the 30+ year maintenance has been done because i just purchased the bike from a friend who had only has it for 2 years. He did not do all that work that you have listed.
Click to expand...
You are contradicting yourself here. You "don't know if [it's] been done", but you know that it was not done within the previous two years?

In that case, you should simply KNOW that it hasn't been done, and, quite frankly, you are foolishly riding the bike before doing the maintenance.

.
 
Thats great news that you have plenty of time and money to work on all of your bikes in your stable. Some people like myself do not have extra money or the know how to fix or adjust a carb.

An opinion with an attitude is not helpful.

Steve said:
If you have to use it "for a few minutes", you need to adjust your carbs, probably after cleaning them and replacing the o-rings.

I can ride any of the bikes in my stable within 30 seconds of firing them up. :D



You are contradicting yourself here. You "don't know if [it's] been done", but you know that it was not done within the previous two years?

In that case, you should simply KNOW that it hasn't been done, and, quite frankly, you are foolishly riding the bike before doing the maintenance.

.
Click to expand...
 
Turn the idle knob counter-clockwise, see if that brings the RPMs down.

But first, yank the throttle a buncha times(bike OFF) and watch the throttle cable, to see if it's doing anything funny....(near the carbs, you'll see the actual cable and everything moving.)
 
Last edited:
Thank you 1_v8_merc

I will check that out.

1_v8_merc said:
Turn the idle knob counter-clockwise, see if that brings the Idle down.

But you should first work the throttle back and forth and watch the cable near the carbs, make sure there isn't anything hanging.
Click to expand...
 
Hi,

lovetoride said:
An opinion with an attitude is not helpful.
Click to expand...

To be fair, the attitude that you may be sensing from Mr. Steve can save your life. Riding around on a motorcycle that is not properly maintained can kill you. Please fix your bike. Don't ride it until you can afford to fix it properly.

If the carburetors and charging system have not been properly maintained, I would doubt that the brakes, tires, bearings, valves, and other critical components have either. Failures on two wheels can have catastrophic results.


Thank you for your indulgence,

BassCliff
 
Last edited:
lovetoride said:
Thats great news that you have plenty of time and money to work on all of your bikes in your stable. Some people like myself do not have extra money or the know how to fix or adjust a carb.

An opinion with an attitude is not helpful.
Click to expand...
No "attitude" intended, just stating fact.
shrug2.gif


No, I don't have "plenty of time and money", either. In fact, I am only at home for a few weeks A YEAR. :eek:

It is because I DON'T have time to work on them, I have gotten them to work correctly.

It takes very little money and just a little know-how to fix and adjust the carbs.
Virtually any problem that could happen has already happened and been documented on the forum.
The answers are just a few searches away.


I know your handle is "lovetoride", but with a 30-year-old bike, you're going to have to do some wrenching, too.

.
 
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