GPz1100B1 engine will not rev - Carb problems.??

#16 PostAuthor: **z1bman** » Tue Apr 08, 2014 9:24 pm

if your using the standard coils there is a good possibility it is one of them braking down

Big Fluff · #17 PostAuthor: **Big Fluff** » Tue Apr 08, 2014 9:28 pm

Al
Coils are next on the list to eliminate on Friday.
Cheers, Will

Big Fluff · #18 PostAuthor: **Big Fluff** » Fri Apr 11, 2014 3:26 pm

Today I have replaced the coils, HT leads, plug caps and plugs...... No bloody difference so it looks like the carbs are shot

When I got the bike about 19 months ago, there was much stagnent fuel in the carbs, which to my guess had been there about 8 years!
I doubt very much that the fuel drillings etc. would ever clean out completely, and I'm sure that this is the problem.
Rather than buy new diaphragms at a costly expense (only to find out that the originals are ok) I have decided to try and source a replacement set. See "WANTED" if you can help.

Regards, Will

#19 PostAuthor: **z1bman** » Fri Apr 11, 2014 3:55 pm

have you removed part 16017 in the diagram ?

Big Fluff · #20 PostAuthor: **Big Fluff** » Fri Apr 11, 2014 4:22 pm

Yep, they're all clean as a whistle :cry:

#21 PostAuthor: **z1bman** » Fri Apr 11, 2014 4:37 pm

if you put your mouth over the elongated hole at the rear of the carb & blow the slides should go to the top of the carb body

#22 PostAuthor: **Taffus** » Fri Apr 11, 2014 4:44 pm

z1bman wrote:if you put your mouth over the elongated hole at the rear of the carb & blow the slides should go to the top of the carb body

or you could push the slides up and hold your finger over that hole and the slides should not drop if the diaphragms are ok :wink:

Big Fluff · #23 PostAuthor: **Big Fluff** » Fri Apr 11, 2014 5:40 pm

Yes done that, they're fine.
i.e. they fall very sloooowly.

#24 PostAuthor: **z1bman** » Fri Apr 11, 2014 5:46 pm

do they have the spring fitted?

Big Fluff · #25 PostAuthor: **Big Fluff** » Fri Apr 11, 2014 6:28 pm

z1bman wrote:do they have the spring fitted?

The carbs looked just like they do in the above pic, i.e. the 'emulsion' jet tube, the little washer then the main jet.
Well that's all that I removed from that particular area.

#26 PostAuthor: **z1bman** » Fri Apr 11, 2014 6:38 pm

Big Fluff wrote:
z1bman wrote:do they have the spring fitted?

The carbs looked just like they do in the above pic, i.e. the 'emulsion' jet tube, the little washer then the main jet.
Well that's all that I removed from that particular area.

if thats the case what is securing the needle ? if the spring is not fitted the needle will be moving in the slide & causing it to run as if the choke is on

#27 PostAuthor: **Taffus** » Fri Apr 11, 2014 7:24 pm

I think he means the spring in the slide?

Big Fluff · #28 PostAuthor: **Big Fluff** » Fri Apr 11, 2014 7:42 pm

Oh come on guys, I'm not that fucking stupid.!
Sorry but ffs I've been continuously riding and fettling bikes for 35 years, do you really think I'd leave the springs out.
By the way, when z1bman posted the spring issue, it was as if there was a spring under the emulsiontube.
I truly appreciate all the help regardless.

#29 PostAuthor: **Taffus** » Fri Apr 11, 2014 7:47 pm

Daren't mention this but had to change the float heights on my b1.
I raised then 1mm from standard and this helped the engine to rev more cleanly up to the red line

Big Fluff · #30 PostAuthor: **Big Fluff** » Sat Apr 12, 2014 12:14 pm

Taffus wrote:Daren't mention this but had to change the float heights on my b1.
I raised then 1mm from standard and this helped the engine to rev more cleanly up to the red line

Mark, that's a good suggestion mate.
Just raised the fuel service level but alas no difference :cry:

No BS34's on ebay at the moment either.

GPz1100B1 engine will not rev - Carb problems.??

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