Author Topic: MotoGPWerks Pipe CB550 (Jetting and video) (Read 44786 times)

Tews19 · « **Reply #175 on:** May 22, 2015, 12:29:27 PM »

Thanks Fly, pulling the carbs now.

mrfish2 · « **Reply #176 on:** May 22, 2015, 12:33:08 PM »

Quote from: flybox1 on May 22, 2015, 12:21:54 PM

if the fuel level changes(rises) slowly after you start the test, you have a float valve dysfunction

So if you have brand new float valves and float needles installed and it's still doing this, then what would you do to remedy it?

flybox1 · « **Reply #177 on:** May 22, 2015, 12:39:12 PM »

Quote from: mrfish2 on May 22, 2015, 12:33:08 PM

Quote from: flybox1 on May 22, 2015, 12:21:54 PM
if the fuel level changes(rises) slowly after you start the test, you have a float valve dysfunction

So if you have brand new float valves and float needles installed and it's still doing this, then what would you do to remedy it?

change the float height

float height is not the goal. correct fuel LEVEL is

flybox1 · « **Reply #178 on:** May 22, 2015, 12:42:04 PM »

(Assuming) he measured the floats (and adjusted if needed) to verify the proper height, Tews19's results above back up why this is a valid test.
Especially with new/aftermarket float needle sets, you cant just ride off thinking you're good. His #4 could have starved that cyl for fuel and run really hot to the point of failure.

stewonepot · « **Reply #179 on:** May 22, 2015, 12:50:31 PM »

hi look into the float bowl vents maybe a blockage
regards Stew

Tews19 · « **Reply #180 on:** May 22, 2015, 02:02:52 PM »

I have a set of unmolested carbs from this bike. Original owner never opened them up. I'm going to swap floats and see how that turns out. If spot on I will leave the floats in. If off I will put the original floats to this carb set back in and adjust per Flybox's advice. Can't beat the assistance here!

flybox1 · « **Reply #181 on:** May 22, 2015, 02:06:58 PM »

Quote from: Tews19 on May 22, 2015, 02:02:52 PM

I'm going to swap floats and see how that turns out.

I wouldnt bother. Adjust yours and retest.
Arent the ones in your carbs OEM's as well?

Tews19 · « **Reply #182 on:** May 22, 2015, 02:09:22 PM »

True. I will adjust and yes OEM.

Tews19 · « **Reply #183 on:** May 22, 2015, 03:34:37 PM »

What a PITA. Been trying #4 all afternoon. It just won't go any higher.

Tews19 · « **Reply #184 on:** May 22, 2015, 03:53:14 PM »

Freaking hilarious. After my post. I adjust again and now it's spot on.

flybox1 · « **Reply #185 on:** May 22, 2015, 04:24:23 PM »

Beers all around!!!!!!

Tews19 · « **Reply #186 on:** May 22, 2015, 05:20:00 PM »

Thanks man! I got 3 of 4 carbs done. My hands have stopped working so I will finish tomorrow. Thanks again fly. Where are you located?

flybox1 · « **Reply #187 on:** May 22, 2015, 05:26:56 PM »

Glad you're getting close.

I'm about 30 min N of Seattle.

Tews19 · « **Reply #188 on:** May 22, 2015, 07:55:36 PM »

Oh that's a great area. I was stationed at Ft. Lewis from 01-05. Very expensive area for houses.

flybox1 · « **Reply #189 on:** May 22, 2015, 08:15:33 PM »

Haha, sweet. By '08, you coulda had twice the house for half the price

. Certainly not that way anymore.
I'll be down at JBLM (Joint Base Lewis McChord) next weekend for my kids track meet.

Tews19 · « **Reply #190 on:** May 25, 2015, 01:22:08 PM »

Got all floats level and sync'd the carbs. Bike is rich as can be so I will most likely use 2 or more sets of new plugs. D7EA plugs currently.

riverfever · « **Reply #191 on:** May 25, 2015, 07:17:07 PM »

Tews my levels were higher than that and I dropped them a lot. Mine are now about 3mm below the flange that the screws sit on. After making that adjustment, I finally was able to keep all 4 cylinders running and not foul out plug 4.

Tews19 · « **Reply #192 on:** May 25, 2015, 07:29:04 PM »

Interesting. I'm fouling the #$%* out of these. Bought 3 new sets of plugs. Rode to a place where I could do a plug chop. My slow jets need to be swapped out. Way to rich. May have to order a.set of 40s. Running 42 now.

riverfever · « **Reply #193 on:** May 25, 2015, 07:38:24 PM »

I just deleted all the pics I had while doing the clear tube off my phone. This is damn near where all of mine ended up. I think I finally had the floats set at 27mm but I really had to mess with #4 to get it the same as the rest. I just forgot about measuring it and kept making adjustments until I finally had it inline with the others. What was interesting was that all last summer I ran on three cylinders (1-3). Like I said in my thread...this is the first time 4 has hung in there. I probably have 30 plugs laying around.

Tews19 · « **Reply #194 on:** May 25, 2015, 07:45:44 PM »

I'm at 12 plugs as of today alone. Is it possible to make a video of it running and when you hit the flat spot? I'm almost positive we have the same issue going. Today mine was so rich the bike was bogging down. But as you stated, if you stay on the throttle it will take off after the bogging down.

mrfish2 · « **Reply #195 on:** May 25, 2015, 07:55:15 PM »

Quote from: Tews19 on May 25, 2015, 07:29:04 PM

Interesting. I'm fouling the #$%* out of these. Bought 3 new sets of plugs. Rode to a place where I could do a plug chop. My slow jets need to be swapped out. Way to rich. May have to order a.set of 40s. Running 42 now.

Why not go back to the stock 38's? From what I've read from other threads as long as the air induction system hasn't changed (i.e. stock airbox vs pods) then you shouldn't need anything other than stock size idle jets.

riverfever · « **Reply #196 on:** May 25, 2015, 07:55:47 PM »

Mine's not doing it nearly as badly now after messing with the needles again but I thought about trying to get a video. If it's not raining or snowing when I get home tomorrow I'll try.

riverfever · « **Reply #197 on:** May 25, 2015, 08:06:04 PM »

Isn't 40 stock?

Tews19 · « **Reply #198 on:** May 25, 2015, 08:08:47 PM »

38s are stock for 069a carbs.

gregripko · « **Reply #199 on:** May 25, 2015, 08:30:48 PM »

Best setup for me was to keep slow jet at #38 and just upped the mains to #105... Runs good

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Author Topic: MotoGPWerks Pipe CB550 (Jetting and video) (Read 44786 times)