ninjette.org - View Single Post - Cleaned Carbs, Replaced Gas, Still having engine problems.

csmith12 · April 14th, 2012, 07:47 AM

Let's assume your carbs are in perfect working order and valves adjusted properly.

Now lets get back to basics and a bit of red-neck tech.

Air + Fuel + Spark

Let's start with air

1. Open the air box - nothing in there right? red-neck tip* Throw an old t-shirt in there and try to start it. (less air) Next, try taking the air filter off completely and empty air box (much more air)

2. Check every vacuum line/carb boots visually for any cracks, holes and generally a good seal. red-neck tip* My guess you already have a can of spray carb cleaner, if not get one. The mist the areas of the vacuum lines with the bike idling. If the engine picks up rpm you got a leak.

3. Inspect exhaust - not clogged up anywhere is it?

Fuel

1. Pull some gas out and try it in a lawn mower, if the mower will run so will the bike

2. Check petcock and fuel to carbs. red-neck tip* Have a beer, then put empty beer can under petcock and pull hose. Move petcock control to all 3 positions to ensure they work as expected. Reconnect.

3. Take the same beer can and put it under each carb bowl and loosen drain screw to ensure float bowls are filling. At this point if the bike will run, then start it and run it for a bit. Try to rev it alittle too. If it dies STOP and check float bowls again. Empty? Fuel filter clogged? Full?

4. Now pull both plug wires and turn it over about 10 or so times and remove plug. Wet from gas = good, dry = bad (vacuum or valves)

Spark

1. Take spark plug out and connect to wire and wiggle it around where you can see it while standing up Turn bike on and turn it over a few times. See or hear a spark? What color is the end of the plug? Reconnect everything

2. You have a fresh battery from your earlier posts right? red-neck tip* Try to jumpstart from car (without the car running)

3. Check batter terminal connections and clean them if needed

4. Follow grounding wire all the way to termination. In good shape?

5. Get a manual if you don't already have one

6. red-neck tip* Pull every fuse that is not required for the bike to run and try again

All in all it should only take about an hour to do those tests and don't require you to take the carbs apart again.

Let us know how it goes and the best of luck to your sir.

April 14th, 2012, 07:47 AM	#111
csmith12 The Corner Whisperer Name: Chris (aka Reactor) Location: Northern KY Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much. MOTY 2015, MOTM - Nov '12, Nov '13	Let's assume your carbs are in perfect working order and valves adjusted properly. Now lets get back to basics and a bit of red-neck tech. Air + Fuel + Spark Let's start with air 1. Open the air box - nothing in there right? red-neck tip* Throw an old t-shirt in there and try to start it. (less air) Next, try taking the air filter off completely and empty air box (much more air) 2. Check every vacuum line/carb boots visually for any cracks, holes and generally a good seal. red-neck tip* My guess you already have a can of spray carb cleaner, if not get one. The mist the areas of the vacuum lines with the bike idling. If the engine picks up rpm you got a leak. 3. Inspect exhaust - not clogged up anywhere is it? Fuel 1. Pull some gas out and try it in a lawn mower, if the mower will run so will the bike 2. Check petcock and fuel to carbs. red-neck tip* Have a beer, then put empty beer can under petcock and pull hose. Move petcock control to all 3 positions to ensure they work as expected. Reconnect. 3. Take the same beer can and put it under each carb bowl and loosen drain screw to ensure float bowls are filling. At this point if the bike will run, then start it and run it for a bit. Try to rev it alittle too. If it dies STOP and check float bowls again. Empty? Fuel filter clogged? Full? 4. Now pull both plug wires and turn it over about 10 or so times and remove plug. Wet from gas = good, dry = bad (vacuum or valves) Spark 1. Take spark plug out and connect to wire and wiggle it around where you can see it while standing up Turn bike on and turn it over a few times. See or hear a spark? What color is the end of the plug? Reconnect everything 2. You have a fresh battery from your earlier posts right? red-neck tip* Try to jumpstart from car (without the car running) 3. Check batter terminal connections and clean them if needed 4. Follow grounding wire all the way to termination. In good shape? 5. Get a manual if you don't already have one 6. red-neck tip* Pull every fuse that is not required for the bike to run and try again All in all it should only take about an hour to do those tests and don't require you to take the carbs apart again. Let us know how it goes and the best of luck to your sir. __________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School