Pipes getting smoking red

Claymation

Claymation

Member
So today i fired up the bike and was running it on the bench and the pipes got smoking red hot, even with a fan blowing on engine the pipes get red, engine starts runs good ideles ok and can adjust carb, WTF???.

trying to just fix a leak, and that didnt leak:(

i did find out i have no vent drilled in my case ?

ill searce the forum on the venting again

any ideas, i cant believe the pipes should get that red , has to be awfull lean or something

guess i never look at the pipes at 80 :)
 
mobsta

mobsta

Well-Known Member
what kind of pipes?how long they been on the bike?when did this start?what kind of leak were you fixn?i know lots of questions wheres the answers?
 
Claymation

Claymation

Member
im fixing a primary leak. the pipes im not sure loud and short with nothing inside and always has shot some flame:),i just noticed it running it on the bench trying to see if i can see where the primary is leaking. I havent really rode the bike or anything since september.
 
E

Eric

Banned
lean condition,, in most cases pipes wont run red hot... check for intake leak.... read plugs...
 
mobsta

mobsta

Well-Known Member
some real short pipes i have seen do get hot.someone else on here had the same issue but i dont know what the fix if any.may be normal,try using the search maybe find the thread on this issue.could still be a lean condition but again short pipes.sorry i cant be more help to you.exhaust leaks can sometimes cause pipes to get hot.good luck:cheers:
 
Claymation

Claymation

Member
well let me ask this ?

with fan blowing on engine bike running on the bench in first gear @2000 RPM can i run the bike for 10 - 20-30 minutes

i was arround 10 minutes keep in mind i was looking for a primary leak not for hot exhaust


Plugs look black and rich

ill check for leak after the neighbors wake up

and my exhaust is a RPGeez 2-1

i did change breather without having carb adjust, carb adjust was done with exhast and did have it in to shop for tuneup after the breather change

breather is the cone point


maybe i need 2 fans :)
 
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E

Eric

Banned
Claymation said:
well let me ask this ?

with fan blowing on engine bike running on the bench in first gear @2000 RPM can i run the bike for 10 - 20-30 minutes

i was arround 10 minutes keep in mind i was looking for a primary leak not for hot exhaust


Plugs look black and rich

ill check for leak after the neighbors wake up

and my exhaust is a RGGeez 2-1

i did change breather without having carb adjust, carb adjust was done with exhast and did have it in to shop for tuneup after the breather change

breather is the cone point


maybe i need 2 fans :)
Click to expand...
the air cleaner may have changed it,, more air in,, not enough fuel to correct air fuel ratio... I'd check it before you run it much... steve @ bikers dream is a bdm dealer, he can help you set it up right...
 
Claymation

Claymation

Member
ok todays findings ,

no intake leak , sprayed all arround gasket

air/fuel mixter screw black and almost sooty cleaned and reinstalled

set carb adjust to above link as best as possible


turning air/fuel mixture screw in motor will die ,,,,,,,,,,,,,,turning it back out 2 turns hits a diffrent stroke but will not die until i remove screw totally.

ran bike for 5 minutes at 2000RPM see pipes getting red at cylynder head and if plugs are black means im rich not lean, Damn i would expect to see them plugs being white the color the pipes get
 
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T

TheDeadOne

Banned
Claymation said:
ok todays findings ,

no intake leak , sprayed all arround gasket

air/fuel mixter screw black and almost sootycleaned reinstall

set carb adjust to above link as best as possible


turning air/fuel mixture screw in motor will die ,,,,,,,,,,,,,,turning it back out 2 turns hits a diffrent stroke but will not die until i remove screw totally.

ran bike for 5 minutes at 2000RPM see pipes getting red at cylynder head and if plugs are black means im rich not lean, Damn i would expect to see them plugs being white the color the pipes get
Click to expand...
Did you check the accelerator pump screw? If it's set wrong, it'll drip fuel, and you'll smell it too. If that's set wrong then it could be just enough fuel to keep it running with the mix screw completely out of it, even if the motor is running lean.

Sounds like you either need to go through the carb and clean it good or it's jetted wrong if it's not in the adjustments.

dead :cheers:
 
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Claymation

Claymation

Member
what i found with my accelerator pump screw is that it does not seat untill it is screwed 100% in tight then i see contact to the lever on the back side then backed it up 1.5 turns.


just as stated here if your idle is low... turn it up a bit...

now spin in the accel pump screw till it seats.

now spin in your fuel/air mix screw till the motor sounds like it wants to die

now spin it back out counting 1/4 turns. Do it slowly to give the motor/carb time to adjust. Do this till the motor sound like it wants to die on this end. Now you have counted those turns and you have say 2.5 turns. Spin it back in 1.25 turns. Or middle to almost dead on each end.

Now adjust your idle to 1,000 rpms on the tach.

Now spin the accell pump screw out 1.5 turns

Now with a few quick stabs at the throttle see if the rpms come up fast like you would think or if it kinda hesitates then takes off. If it does hesitate then spin the accel pump out another 1/4 turn and repeat till you get what sounds good.

If that don't fix the sneeze... you can spin out the accel pump a bit more... but anything over 2.5 turns MAY mean you need a larger intermiediate jet. This is a common debate.

Then re-adjust your idle to about 1,000 RPMs. Too low and it may die. Too high and it will clunk into first gear.
 
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