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Another Carburetor Project. 4 months 4 weeks ago #30440

  • KZQ
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It seems to me that the most common problem with 1300s is over rich mixtures and flooded #1 carbs. A friend of mine has been struggling with just these issues on his recently restored 79 1300. It's a beautiful bike, don't you agree?
 
This was a bare frame restoration. Check out the stainless steel six into two exhaust system. I've got my suspicions about where the problems lie but I'm going to start by making sure the engine is properly set up. To me that means valve clearance check is first. Then a close inspection of the carb innards and if they're not already in there a Dyno Jet kit and needles. The owner reports the bike runs great for 30 to 50 miles and then fouls the #1 plug. To me that says too high fuel levels.
I'll keep you posted.
Bill
1947 Indian Chief, 1968 BSA Shooting Star, 1970 BSA 650 Lightning, 1974 Kawasaki W3, 1976 KZ900 A4, 1979 KZ750 B4, 1979 KZ750 B4 Trike, 1980 KZ550, 1981 KZ1300, 1982 KZ1100 Spectre, 1985 Kawasaki ZN1300, 1987 Yamaha Trail Way, 2000 Honda Valkyrie Tourer, 1981 GL 1100, 2009 Yamaha RoadLiner S
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Another Carburetor Project. 4 months 4 weeks ago #30441

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Yes, it looks good to me, Bill. A neat exhaust - does it sound good without being too loud?
The black engine treatment seems to be popular now.
If the bike was mine, I’d definitely add some stripes to the tank, side panels etc..
Good luck with the carb work.

Have you added to your own bike fleet, Bill?The list seems longer, but I can’t be sure if there’s a new one or two in there!

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Another Carburetor Project. 4 months 4 weeks ago #30442

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This topic brings up some interesting thoughts. Bill (KZQ) lives in Bend Oregon at an elevation of 3400 Ft. above sea level. An hours drive from Bend will get you into the mountains and if you decided to travel to Marion County Oregon you would be at 14,509  Ft. above sea level. Such a challenge to jet a carburetor to incorporate all the different elevations above sea level.
Pat (my wife) and I live in southern Ontario which for the most part is around 1000 Ft. above sea level so tuning a carb around here will work for all of our driving up to at least 2 days travel away. 

I remember taking a trip to Cheyenne Wyoming a couple of years ago and both Pat and I were having a bit of trouble breathing. Our son laughed at us and said "it's the elevation. We're 6000 ft above sea level." Now at 6000 ft, we just noticed that we were breathing at rest as if we were out on a fast walk. Pat and I also did a river cruise through Europe and added a 3 day land trip in Switzerland. On one of those days, we took a cable train ride up to Jungfrau Switzerland with an elevation of 13,641 Ft. Our tour guide was very concerned about Pat and I being on the trip because of our age and ability to acclimatize to the elevation change. The train stopped twice on the way up for 20 minutes each time to help us ( the tour group) out with the elevation change. Walking for us at that elevation was a very slow pace so as to not pass out.

Hell, flying airplanes over 10,000 elevation requires mandatory oxygen supplement.

I'll be interested to hear how you make out and what jets you choose and how that works for traveling in your area.
KB
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Another Carburetor Project. 4 months 4 weeks ago #30443

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There are times when i question what I know and what I think I know. "Are CV carbs altitude compensating"?? Apparently yes and no is the answer. Compensating only on the main jet due to the influences of the air density and how it lifts the throttle slide. It doesn't compensate at idle and wide open throttle. Hmmm....This is a REALLY good read from  The Motorcycle Project. CV Carb Article If you haven't cruised around this site, you should especially the guys with CBX's . His articles are well written. I actually have his site book marked.









 
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Another Carburetor Project. 4 months 4 weeks ago #30444

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biltonjim post=30441 userid=149Yes, it looks good to me, Bill. A neat exhaust - does it sound good without being too loud?
The black engine treatment seems to be popular now.
If the bike was mine, I’d definitely add some stripes to the tank, side panels etc..
Good luck with the carb work.

Have you added to your own bike fleet, Bill?The list seems longer, but I can’t be sure if there’s a new one or two in there!

Hi Jim,
I've literally hit the wall on bikes. I don't have any more room, especially since I built that trike.
I'm doing this job as a trade although I'd do it for nothing more than the learning experience and the opportunity to document the process. As I said in my first post I believe this carb issue is the most common problem that new 1300 owners have to face when rehabbing a 1300. I'll be calling on you folks for advice as I get into it.
I presently have a Team Oregon bike up on the lift for some minor damage repair. I'll finish it in a day or two and then I'll get into this 1300.
Regards
Bill
1947 Indian Chief, 1968 BSA Shooting Star, 1970 BSA 650 Lightning, 1974 Kawasaki W3, 1976 KZ900 A4, 1979 KZ750 B4, 1979 KZ750 B4 Trike, 1980 KZ550, 1981 KZ1300, 1982 KZ1100 Spectre, 1985 Kawasaki ZN1300, 1987 Yamaha Trail Way, 2000 Honda Valkyrie Tourer, 1981 GL 1100, 2009 Yamaha RoadLiner S

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Another Carburetor Project. 4 months 4 weeks ago #30445

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So let's talk about carb parts availability and vendors? Where to source diaphragms, etc?

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