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rs34's
- mark1122
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76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
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- 79MKII
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Also, how do you guys feel about using the same size pilots based on what worked before with totally different carbs? For example: I had 30 pilot jets in my 33 sb's, so is it safe to assume that I might need 30's in the rs 34's?? I'm guessing no, but just wondered what you guys thought about that.
The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
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- davel
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- mark1122
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Also, how do you guys feel about using the same size pilots based on what worked before with totally different carbs? For example: I had 30 pilot jets in my 33 sb's, so is it safe to assume that I might need 30's in the rs 34's?? I'm guessing no, but just wondered what you guys thought about that.
I think the round slides and flat slides will draw dif cfm's so u realy need to test each 1. 1 carb would only give u a starting point for the other.imo.
I am running the same cams (.424 lift, 260dur.) and bigger pistons(fromm 1135cc to 1327cc.) with more porting and with the RS carbs my jet sizes have all gone down from my vm33's to the rs34's.
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
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- 79MKII
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The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
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- Z1109R Fin
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If ya go back to 33´s just dump the RS-worthless-POS my way. I´ll take care of disposal;)
Z1000R ´83...Slightly modified...
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- martijn
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79MKII wrote:
I am running the same cams (.424 lift, 260dur.) and bigger pistons(fromm 1135cc to 1327cc.) with more porting and with the RS carbs my jet sizes have all gone down.
at what lobe centers?? Cause I'm experiencing pinging problems in the mid
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- Old Man Rock
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Jesus Christ, how the hell are you guys able to stay on the friggin bike at this power.... What, you start out at in 4th gear so as not to spin the tire... New KZ tranny, 4th & 5th gear only. :blink:
I mean damn it, I look at your bike images and I don't see any wings. :laugh: :woohoo:
Pure awesome...
OMR
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
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- davel
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mark1122 wrote:
79MKII wrote:
I am running the same cams (.424 lift, 260dur.) and bigger pistons(fromm 1135cc to 1327cc.) with more porting and with the RS carbs my jet sizes have all gone down.
at what lobe centers?? Cause I'm experiencing pinging problems in the mid
Mark, My 1075 also pinged in the midrange until I spent ALOT of time tuning the ignition advance. Full advance came in way too early (around 2200) on my engine. I now have centrifugal advance beginning at 1500rpm and full advance around 4000. This is VERY difficult to achieve with springs and weights. I was able to get there by modifying the stock weights (grinding them down to lighten them) and ordering multiple spring combinations from a company called Lee Spring. Even then, I had to modify the springs I ordered to get things to work properly. An easier (more expensive) way to go is with a Dyna 2000 Ignition. It comes preprogrammed with a curve that should work very well. It also has a built-in rev limiter. That's nice.
Are your RS34s clacking while cruising above 3000rpm?
79MKII, If your carbs are constantly clacking while you are cruising, that's not a good sign and not necessarily related to the carbs. IMO carb clacking has little if anyting to do with jetting or ignition timing. I know it sounds strange but you might want to pull the exhaust baffle out completely and see what happens. If the bike runs just as good (or better) and the clacking subsides, you will want to consider perfoming some exhaust mods. If not, Just throw the baffle back in and start poking around elsewhere.
My carbs clacked and my bike ran so-so until I got everyting tuned just right. Now it pulls like a truck all over the rev range without a clack or ping...but it took a while.
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- saxjonz
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Very good information. By the clacking I am assuming you mean the pisst sound or sneeze that noise of the air going back through the carbs. Thanks for sharing with us.
The comp baffle in my kz made it run so much better and still kept that mean sound to it. That I noticed in my bike any way. Made it run much faster from the get go I think. One of the best investments I made besides the smooth bores on the bike for running better.
79 LTD B3
80 LTD B4 1075 kit JE Pistons .410 cam grind, Bassani, 31 keihin CR Specials...
1980 Z1R, 2002 ZRX1200, 2003 ZRX1200
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- mark1122
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By the clacking I am assuming you mean the pisst sound or sneeze that noise of the air going back through the carbs.
.[/quote]
The clacking is the noise of the flat slides banging back and forth against the carbs body as the piston changes direction in the cyl. The cyl pressure changes from pos to neg and this actually pushes and pulls on the carbs slides, and causes this clacking noise.
My carbs are fairly quiet at idle up to 3000rpm then they are a little noisy at criuse, about 4000. not bad though.
My baffle size is 2â€.
My cam lobe centers are set at 110*, 110*.
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
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- mark1122
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OK, it's been a while but I took my bike out for a good 20 mile ride and it's running great. The only problem I have is the noisy carbs. These flatslides are clacking around like crazy! The carbs are brand new and now have a total of 31 miles on them. The engine is tuned perfectly, cams degreed, and it still clacks at idle and while riding. The exhaust is a V&H chrome megaphone with a race baffle, but sill very quite and plenty of back pressure. I don't know if I can take that noise. I'm thinking of going back to 33 smoothbores. Thoughts??
davel wrote:
thought I'd share my RS34 experience.
I've installed a 1075 kit and have experimented with a V&H and Jardine 4-1 exhaust. My experience is that the RS34s are great and will provide excellent throttle response, midrange and top end power IF the rest of engine is set up properly. Here are a few things I've found through experience:
* Exhaust tuning is critical. I've been able to get good results from both a V&H pipe and my Jardine pipe but not with the stock baffle installed. Removing the baffle in the V&H pipe produced good power from 4000RPM to redline. Inserting a competition baffle with a 2.25" ID brought my usable power range to 3000RPM. The competition baffle made a noticable increase in mid-range torque and eliminated reversion above 3K RPM (no more carb clacking). Experimening with and finding the correct exhaust baffle size for your setup will produce better throttle response, more mid range torque and better fuel mileage without hurting top end power.
Hope this is useful.
What is the Diameter of your baffle?
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
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