Author Topic: Cam Shaft and carb question  (Read 415 times)

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Offline Wantabeach

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Cam Shaft and carb question
« on: September 16, 2019, 02:06:01 am »
Over the 20 year course of the C10, did the carbs or cams or something else change that could impact the performance significantly?  Or should all C10s perform roughly the same all things being equal? 
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Offline DC Concours

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Re: Cam Shaft and carb question
« Reply #1 on: September 16, 2019, 02:08:33 am »
No. All C10s perform roughy the same. Some colors however seem faster.

Why do you ask?


Offline Bob_C_CT

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Re: Cam Shaft and carb question
« Reply #2 on: September 16, 2019, 03:39:27 am »
The ZG1000 was sold in the European market as the GTR1000. The had different carburetor caps that limited the slide at wide open throttle.i think the horsepower was limited down to low 60s to 100 hp depending on which country it was sold in compared to the ZG1000 that had a claimed 108hp.
So if you have carbs that were on a GTR or a GTR bike you could expect some hp differences.
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Offline Lee

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Re: Cam Shaft and carb question
« Reply #3 on: September 16, 2019, 12:03:36 pm »
Did any known Euro spec carb C10/GTRs ever make it to states? Just curious in a historical kind of way.

Sure would be worthy of inspection if buying carbs off Ebay from out of country. If that ever happens. Jetting seems leaner too on Euro spec GTR according to literature.

Thanks for any reply.

Offline Wantabeach

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Re: Cam Shaft and carb question
« Reply #4 on: September 16, 2019, 12:47:11 pm »
No. All C10s perform roughy the same. Some colors however seem faster.

Why do you ask?

My 2006 seems a lot more responsive down low compared to my sons 1992.  He has a little rust in the gas tank so maybe a carb job would help but really it runs just fine and might pull harder on the top end.
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Offline connie_rider

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Re: Cam Shaft and carb question
« Reply #5 on: September 16, 2019, 03:46:54 pm »
Did any known Euro spec carb C10/GTRs ever make it to states? Just curious in a historical kind of way.

Sure would be worthy of inspection if buying carbs off Ebay from out of country. If that ever happens. Jetting seems leaner too on Euro spec GTR according to literature.

Thanks for any reply.

Anything is possible on an individual basis, but the Eu models were not sold here.
The Canadian model might be similar to the Eu bikes, and some may have migrated down from Canada.
    The first giveaway would be KPH instead of MPH on the speedo.  :rotflmao:

The Eu bikes had the travel limiter, mufflers with restricted tips, and (I think) some had a heating system for the carburetor.
Changing the top cap with one from a USA model solves the slide travel problem.
Jetting is close e'nuff to be no big deal.

I (err, I mean) somebody (may have) sent a few of the 'merican top caps to their friends in Eu...
  also some US mufflers were shipped, or mods to the muffler restrictor were figured out and (uhh) adjusted...
   [(err) If someone did this, it was done for improved emission's only...                  <sly grin>

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« Last Edit: September 17, 2019, 03:04:11 am by connie_rider »
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Offline DC Concours

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Re: Cam Shaft and carb question
« Reply #6 on: September 16, 2019, 04:05:19 pm »
Thanks Ted. This is info I didn't know. I thought all the c10s were the same.

Offline bajasam

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Re: Cam Shaft and carb question
« Reply #7 on: September 16, 2019, 04:19:40 pm »
maybe your 2006 has had some of the popular cam or camsprocket mods done to it. Do you know its history or had the valve cover off for a looksee.Those mods would give you the down low perf you describe.

Offline mgoodrich

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Re: Cam Shaft and carb question
« Reply #8 on: September 16, 2019, 05:02:57 pm »
https://sites.google.com/site/shoodabenengineering/intake-and-exhaust

This is what bajasam is referring to. There are also reground cams that you may be able to get on this site as well.

Offline Stasch

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Re: Cam Shaft and carb question
« Reply #9 on: September 16, 2019, 06:22:26 pm »
In USA, California carbs were different from the other 49 states:

    CALI's = 130 MJ's
    49 US = 125 MJ's

    Pilot jets were same on both: 35

California models also had some smog equipment - charcoal canister and extra tubing, along with extra fittings at rear of fuel tank.

Not sure if or how much the jetting affected performance.
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Offline MAN OF BLUES

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Re: Cam Shaft and carb question
« Reply #10 on: September 16, 2019, 09:39:48 pm »
In USA, California carbs were different from the other 49 states:

    CALI's = 130 MJ's
    49 US = 125 MJ's

    Pilot jets were same on both: 35

California models also had some smog equipment - charcoal canister and extra tubing, along with extra fittings at rear of fuel tank.

Not sure if or how much the jetting affected performance.


below I have added a pdf file, identifying all of the various carb parts, from both the early Ninja models, and the C10, in various configs (cali/US/Can) that are "north american bikes"..

enjoy...

I placed this also in the section where we keep bike data, in the archives for future use.
(It can be accessed here also)
http://forum.cog-online.org/fuel-cooling-and-oil-systems/
« Last Edit: September 16, 2019, 09:55:27 pm by MAN OF BLUES »

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Offline Wantabeach

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Re: Cam Shaft and carb question
« Reply #11 on: September 17, 2019, 06:00:35 pm »
Do you think an in-line fuel filter would impact performance? 

Have not done over flow tubes yet but Eric’s bike has a filter.
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Offline mgoodrich

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Re: Cam Shaft and carb question
« Reply #12 on: September 17, 2019, 06:43:18 pm »
The filter was probably added when the original PO noticed rust in the tank (as you have already noted) and added it to keep the rust out of the carbs.

I have a filter on mine as well for the same reason.  A previous bike rusted its tank (my 86) and I added the filter for that one, and carried it on for my 2005.

I haven't noticed any performance issues on mine with it on, or off.

Others have had issues with the filter added, but it seems to be the type used and if it mounted in such a way it restricts the line.

Offline strum

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Re: Cam Shaft and carb question
« Reply #13 on: September 17, 2019, 06:52:53 pm »
 if you have rust in the tank then a filter is a bandaid.   Clean you tank !!!!
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Offline SteveJ.

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Re: Cam Shaft and carb question
« Reply #14 on: September 17, 2019, 06:56:25 pm »
I've done Dyno pulls with a Napa 3006 filter. No issues.

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Offline m in sc

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Re: Cam Shaft and carb question
« Reply #15 on: September 17, 2019, 07:21:29 pm »
sometimes it particulate from filling up as well. filter isn't nec a bandaid, just a precaution.  should be fine. i run them on bikes with new and freshly lined tanks.

Offline Steve in Sunny Fla

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Re: Cam Shaft and carb question
« Reply #16 on: September 17, 2019, 07:39:31 pm »
the inline filter can absolutely affect the power, if the fuel levels are lower because of poor filling. SteveJ is right in that a proper inline filter doesn't necessarily impact power, but there is a caveate there - Steve had the tip over valves removed from the his tank cap (the vent valves). If you have both valves intact and they are imparting ANY limitation to pressure equalization to vacuum, and then install the inline filter, then yeah, issues. Steve
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Offline strum

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Re: Cam Shaft and carb question
« Reply #17 on: September 18, 2019, 10:39:58 am »
What l meant when I said bandaid is the tank needs a thorough clean. Rust will only get worse if not addressed.   
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Offline m in sc

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Re: Cam Shaft and carb question
« Reply #18 on: September 18, 2019, 12:30:16 pm »
it also as steve eluded to, the flow rate of the filter.

Offline Gitbox

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Re: Cam Shaft and carb question
« Reply #19 on: September 18, 2019, 01:38:07 pm »
Quote
steve eluded to

Freudian slip?  :)
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Offline m in sc

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Re: Cam Shaft and carb question
« Reply #20 on: September 18, 2019, 01:48:09 pm »
my bad., alluded to.

Offline DC Concours

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Re: Cam Shaft and carb question
« Reply #21 on: September 18, 2019, 02:50:03 pm »
What are tip over valves in the tank? And why would you remove them?


Offline bajasam

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Re: Cam Shaft and carb question
« Reply #22 on: September 18, 2019, 03:04:53 pm »
same principal as roll-over valve in the filler neck of cars and trucks, keeps fuel from draining out of tank vent system when vehicle rolls over or tips over.