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Old 05-17-2013, 04:37 PM   #76786
Mambo Dave
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Sea Foam before and after winter storage should be a rule.

Not two weeks after pulling it out of storage, but instead for the first tank - and at a high strength.
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Old 05-17-2013, 05:23 PM   #76787
Adv Grifter
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Quote:
Originally Posted by 8gv View Post

So DR detectives, what say ye?
Blocked Pilot Jet? Replace it.
Check for crap in your intake track.
Make certain there is no WATER/Rust residing in bottom of fuel tank.
Have you checked the little plastic white fuel filter? It lives in the metal fuel tube going into Carb.

Bike will run pretty well with one plug ... but much better with two. I believe they fire just a hair apart from each other ...not sure.

Good luck getting it sorted.
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Old 05-17-2013, 05:30 PM   #76788
8gv
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Quote:
Originally Posted by motolab View Post
Are you sure the main jet is clean? What size is it? What air filter is installed? I know you said that the airbox is unmolested, but is the snorkel in place? What is the float height?

Regards,

Derek
Thank you for interest in my plight.
I can see through the main jet. Will check size. Air cleaner is stock foam and clean. Snorkel is in place. Float is parallel to edge of top half of carb when leaned until needle seats.
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Old 05-17-2013, 05:31 PM   #76789
8gv
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Quote:
Originally Posted by Mambo Dave View Post
Sea Foam before and after winter storage should be a rule.

Not two weeks after pulling it out of storage, but instead for the first tank - and at a high strength.
My first tank was pretty strong Sea Foam.
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Old 05-17-2013, 05:37 PM   #76790
motolab
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Quote:
Originally Posted by Adv Grifter21433006
Blocked Pilot Jet? Replace it.
While replacing the pilot jet for good measure won't harm anything, 8gv said that he has no problems below 1/4 opening and that all of his problems are confined to 1/4 opening and above (which the pilot jet is not responsible for).

Regards,

Derek
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Old 05-17-2013, 05:38 PM   #76791
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Quote:
Originally Posted by 8gv View Post
I can see through the main jet.
Being able to see through the jet isn't a very good indicator of whether or not the jet is clean.

Regards,

Derek
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Old 05-17-2013, 05:53 PM   #76792
8gv
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Originally Posted by motolab View Post
Being able to see through the jet isn't a very good indicator of whether or not the jet is clean.

Regards,

Derek
So I can soak it and clean it with a guitar string while I wait for a new one to come.
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Old 05-17-2013, 06:08 PM   #76793
TUCKERS
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Today installed Acerbis tank (2 taps), Deluxe air screw, GSXR can and big mid-pipe, K&N air filter.

It ran good before.

Now it runs like crap.

Stutters and bangs and flames at full revs

Shoots FLAMES out the exhaust

Pops and bangs on decell. Flames shoot out and it sounds like a big gun going off. BAM! BAM!

What do I do next?

All stock before.
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Old 05-17-2013, 06:10 PM   #76794
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^ hey usually you have to pay even more money to get flames out the exhaust.
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Old 05-17-2013, 06:14 PM   #76795
TUCKERS
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The grandchildren were pretty impressed, the Mrs not so much
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Old 05-17-2013, 07:09 PM   #76796
Adv Grifter
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Quote:
Originally Posted by TUCKERS View Post
Today installed Acerbis tank (2 taps), Deluxe air screw, GSXR can and big mid-pipe, K&N air filter.

It ran good before.

Now it runs like crap.

Stutters and bangs and flames at full revs

Shoots FLAMES out the exhaust

Pops and bangs on decell. Flames shoot out and it sounds like a big gun going off. BAM! BAM!

What do I do next?

All stock before.
Wow! That is unusual! A few things come to mind ...
1. Plastic shavings in the new tank from manufacturing. (Always rinse before use) Tiny bits inside may have clogged up something in the Carb?

2. "Deluxe air screw"? You mean an extended Fuel screw on bottom of Carb? If so ... some are faulty and don't work properly. I think Pro Cycle had a few bad ones from a supplier ... this a while back. Some don't fit the Carb ... but can't imagine it would create the results you're getting!

3. With the mid pipe, GSXR Can and K & N you are flowing more air but not letting much in. Might need to pull snorkel and go with a slight increase on main jet size? (maybe one size up?)
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Old 05-17-2013, 07:28 PM   #76797
Mambo Dave
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Quote:
Originally Posted by Adv Grifter View Post
2. "Deluxe air screw"? You mean an extended Fuel screw on bottom of Carb? If so ... some are faulty and don't work properly. I think Pro Cycle had a few bad ones from a supplier ... this a while back. Some don't fit the Carb ... but can't imagine it would create the results you're getting!
and some guys lose, or leave in, either the spring or the o-ring that need to be accounted for.

I've heard of similar incidents from o-rings that were destroyed, forgotten about, springs that flew, etc. all from the fuel screw area.
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X bike won't work in Y scenario rather than actually riding
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Old 05-17-2013, 08:03 PM   #76798
8gv
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Quote:
Originally Posted by Adv Grifter View Post
Blocked Pilot Jet? Replace it.
Check for crap in your intake track.
Make certain there is no WATER/Rust residing in bottom of fuel tank.
Have you checked the little plastic white fuel filter? It lives in the metal fuel tube going into Carb.

Bike will run pretty well with one plug ... but much better with two. I believe they fire just a hair apart from each other ...not sure.

Good luck getting it sorted.
Tank is clean. Fuel inlet filter is clear.
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Old 05-17-2013, 08:16 PM   #76799
ER70S-2
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Quote:
Originally Posted by TUCKERS View Post
Today installed Acerbis tank (2 taps), Deluxe air screw, GSXR can and big mid-pipe, K&N air filter.

It ran good before.

Now it runs like crap.

Stutters and bangs and flames at full revs

Shoots FLAMES out the exhaust

Pops and bangs on decell. Flames shoot out and it sounds like a big gun going off. BAM! BAM!

What do I do next?

All stock before.
Did you open the airbox? If so you're really lean. If not, it should run reasonably well without jetting changes. At 6,000 feet mine jumped in performance when I added the GSXR, without jetting changes (snorkel out).

I'm thinking you're quite lean, the DR runs pretty well when way too rich, the gas mileage just plummets.

I don't know much about the K&N but if it's over oiled I think the air flow chokes.
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Old 05-17-2013, 09:02 PM   #76800
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Quote:
Originally Posted by joefromsf View Post
Could be a vapor lock in the gas tank. What kind of tank and gas cap do you have? Note that you can usually tell if its vapor lock by immediately opening the gas cap when it dies. If you hear air being sucked in, then it was probably vapor lock.
That's not vapor lock, that describes a blocked gas tank vent hose. Which is what I think is the culprit, spjinseatle. As Joe describes, when the engine starts to sputter, open the fuel cap. If the engine immediately recovers, along with a whoosh of air, you know you've found the trouble.

Vapor lock often occurs when engines are shut off in hot climates. Gasoline starts to vaporize in the fuel lines. The pressure in the lines keeps fuel from flowing, keeping the engine from restarting. Park the bike (or car) in the shade for ten or fifteen minute, and often all will be well.
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Krusty ... screwed with this post 05-17-2013 at 09:16 PM
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