GTR giving me a hard time backfiring and stuttering

[mitcheman]

Hi,

In dont think i'm gonna meet you guys in Breda. Bit of a long drive. Thnx for the help anyways :-D

[MAN OF BLUES]

The needle guide is what Steve and MOB thought could be the problem.

PS. found an easy way to pull the carbs. In a nutshell:  open up airbox, pull the airboots back and you can take the carb out no problem.

I don't think anyone here has ever mentioned that. Sounds like a good idea to try when I next pull my carbs.

Ride safe, Ted

PS: Are you going to meet us in Breda NL?

my hands don't fit in the airbox.....


oh, on a lighter note.... isn't it amazing how Steve and I could diagnose perfectly what was wrong, right from the get go..... without even seeing the carbs.....?


and you guys just have to wonder how we know these things..... . heheheh I only posted the cause twice before it was "discovered"...

[VirginiaJim]

Trying to be Rodney Dangerfield?

[MAN OF BLUES]

Trying to be Rodney Dangerfield?

did not get the anolgy, but I'll add...
"my wife jsut told me the car is in the dining room.... I asked wtf, and how did this happen..... her reply was I just took a left turn in the kitchen...."

I can't get no respect.... around here... ya know?

https://youtu.be/Iwu-6GxBHN4

[Nosmo]

"PS. found an easy way to pull the carbs. In a nutshell:  open up airbox, pull the airboots back and you can take the carb out no problem."

My hands barely fit in the airbox, but that's how I've always done it.

[mitcheman]

got my hopes up to soon...

when constant at 3000 4000 rpm she keeps coughing down the number 4 pipe.. sparks 1 2 3 are white ish and number 4 black ish.
carb 4 has been completed with missing parts but still i'm having issues there..

See the pic. spark 1 is white number 4 is black.

what am i doing wrong?

[qman]

You may also have a spark issue. pull the wire and take the spark plug connector off to check for corrosion, sometimes you can cut a 1/4 inch off the wire so that it has clean copper. Pull the wire off the coil and check the resistance of the wire. Should be around 5k ohms I believe with the connector on.

[mitcheman]

Well I checked the leads, spark caps and plugs. Number 4 lead was lose in the cap. cut it and rescrewed the cap on. Now I got no problems until 5000. When in neutral and I hit 5000 rpm the reight pipe starts shooting again in the pipe.

Could it be that number is getting not enough fuel?

[mitcheman]

Okay little update.

Just switched the coils l to r and r to l. And I replaced the number 4 spark. Bangs down the pipe at 5000 rpm looks solved. Gonna test ride it and gonna come back to you.

[Brad Baerwald]

Mitcheman,  These guys are awesome!  I'm sure that together you guys will get that 4th cylinder work'n right!   They helped me...I was convinced I had both cams timed right and they saw in a photo I sent that I was using the wrong timing mark on the intake cam!

I miss NL,  I lived there 2 different times in my life.  1st time in Den Hauge  and the 2nd time in Den Dolder (if I remember corectly ha ha)  My dad worked for NATO the first time I was there (1971-1974)  I was at the airbase (1985 -88)

[mitcheman]

So I think she's good now.

This is my tune up: https://youtu.be/2nzG1GDHpB8
the drop is from me turning on the radiator fan.

Ps. Don't mind the noise...need a new (after market) exhaust.

[MAN OF BLUES]

sounds like a GTR is running....woo hooo....

[Tzigane]

Yay!