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Post by Walms on Sept 26, 2016 14:54:00 GMT -5
Wouldn't the same carb have a stronger signal on a H2 than on a H1?
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DONE
Sept 26, 2016 15:26:21 GMT -5
Post by shiloh on Sept 26, 2016 15:26:21 GMT -5
Wouldn't the same carb have a stronger signal on a H2 than on a H1? If that was case, why put even bigger carbs on an H1, ie 32`s, 34`s ? I did some research and H2 carbs seem to work ok on H1`s, not as big as the newer carbs, and they fit about as good as the H1`s without modding the engine case or bowls( h1 bowls fit the h2 carbs). Ian, I got a set of Denco adapters and a set of new flanges that were supposed to fit these adapters for H2 carbs, well they dont, so I`ve elongated the bolt holes in the flanges to match the adapters. I decided to do that, because I`m tired of sending stuff back, people selling things that don`t match the description is driving me insane, They where advertised as H2 flanges, so they should have had the proper slight down ward angle, proper bolt spacing etc, not. So to keep the carbs at a more level angle, I`ll get the adapters machined, 0-5mm taper, that`l work and not interfere with fit. Getting closer, Just might get this thing running before the snow flies, maybe.....
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Post by Walms on Sept 26, 2016 15:58:19 GMT -5
If that was case, why put even bigger carbs on an H1, ie 32`s, 34`s ? I'm taking about the vacuum created by the motor... A bigger vacuum pump will draw more fuel out of the carb. It wasn't a comment about the H1's being able to take advantage of a bigger carb. For example, reeds create a stronger signal so if you put my carbs on your bike, your bike would likely run lean.
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DONE
Sept 26, 2016 16:18:37 GMT -5
Post by shiloh on Sept 26, 2016 16:18:37 GMT -5
Ya I understand that, thats why I was reluctant to go big on the carbs, as others previously suggested. Being pretty much stock, I figured either stock carbs or h2 carbs, as they seem to work with the h1, well based on any of the research I did. Time will tell. The h2 carbs I got were way cheaper than trying to scrape up parts to build 3 H1 carbs, prices are crazy for H1 carbs and or parts.
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DONE
Sept 26, 2016 17:01:56 GMT -5
Post by mraxl on Sept 26, 2016 17:01:56 GMT -5
When you put H2 carbs on an H1 engine, the pump (cylinder) is smaller and the venturi (30vs28) is larger. So jets need to be larger than originally fit on H2. As example, a guy put H1 carbs on an S3 and used H1 jets... he ignored my comments about increasing jet size and fried his engine. Since the H2B/C carbs have increased jet sizes because of oil mixing (as Zambia noted) they may do alright but be sure to do a plug chop to be sure.
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DONE
Sept 26, 2016 18:43:04 GMT -5
Post by shiloh on Sept 26, 2016 18:43:04 GMT -5
When you put H2 carbs on an H1 engine, the pump (cylinder) is smaller and the venturi (30vs28) is larger. So jets need to be larger than originally fit on H2. As example, a guy put H1 carbs on an S3 and used H1 jets... he ignored my comments about increasing jet size and fried his engine. Since the H2B/C carbs have increased jet sizes because of oil mixing (as Zambia noted) they may do alright but be sure to do a plug chop to be sure. absolutely, I`m extremely keen on making sure tuning is good, plug chops are high on the agenda.
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DONE
Oct 14, 2016 15:44:28 GMT -5
Post by shiloh on Oct 14, 2016 15:44:28 GMT -5
My Lakeland goodies arrived today, all in one and a super regulator, got them mounted and plugged in, turned on all the important switches(no battery hook up), kicked it a few times and got spark on all three plugs. If I wasn`t still waiting on choke plungers, I probably could of had it running today. Anyway, another hurtle passed.
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DONE
Oct 14, 2016 15:45:46 GMT -5
Post by kawonda750 on Oct 14, 2016 15:45:46 GMT -5
Alright!!
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DONE
Oct 14, 2016 15:57:29 GMT -5
Post by shiloh on Oct 14, 2016 15:57:29 GMT -5
This has been the longest build I`ve done to date, a little over a yr now, since Paul provided me with frame/blank canvas. I`m really impatient when it comes to these kind of thing, get `er done and go for a ride. It`ll be a few weeks now before I can get back at it as I`m off to heavy equip`t on Monday down in London, time again to broaden my horizons, this is an old dog that likes new tricks.
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DONE
Nov 5, 2016 4:39:35 GMT -5
Post by shiloh on Nov 5, 2016 4:39:35 GMT -5
Home this weekend, for a day and a 1/2, after catching up on my neglected chores, I`ll be gassing up the build and seeing if it`ll pop to life. I`m so excited and nervous at the same time, even it it farts, I`ll know everything is in the right place. Fingers crossed, I`ll post the out come good or bad.
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DONE
Nov 6, 2016 16:19:20 GMT -5
Post by shiloh on Nov 6, 2016 16:19:20 GMT -5
Well it started and ran, fuel line issues, will need to get some tygon. Has a couple little pin hole leaks in the pipes, my welds apparently aren`t so great , but I`ll plug them up eventually. My daughter shot a vid of it`s first run up, I`ll get that up as soon as she figures out how to get it off her phone. Well at least it runs, I`ve got all winter to get the bugs out. I`m so happy, 1yr and a month, that`s a long build even for me. Cheers
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jyrgnorway
2nd Gear
H2B CAFE, H2B, H1B, F8 BISON, Z1000ELR, RD500
Posts: 468
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DONE
Nov 8, 2016 18:15:09 GMT -5
Post by jyrgnorway on Nov 8, 2016 18:15:09 GMT -5
If that was case, why put even bigger carbs on an H1, ie 32`s, 34`s ? I'm taking about the vacuum created by the motor... A bigger vacuum pump will draw more fuel out of the carb. It wasn't a comment about the H1's being able to take advantage of a bigger carb. For example, reeds create a stronger signal so if you put my carbs on your bike, your bike would likely run lean. I believe it is the other way around Walms. Reeds make an longer, "weaker" signal. The rotary or piston port makes a more abrupt signal, hence stronger. Every carb I know of made to suit a reed engine is way too rich for our piston ports. And my h1 needed significant richer jetting after the reeds were put in. (slides, pilots, needle height and mains) And yes: H2 creates stronger signal than a H1. I know, because I have ported both H1 and H2's using same VM34 carbs and same Figaroli H2 pipes. The H1 needs 270 mains!!!!!
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DONE
Nov 8, 2016 18:23:38 GMT -5
Post by nevillelush on Nov 8, 2016 18:23:38 GMT -5
You are correct Jorgen, higher air speed will mean smaller jets.This is why H1 engine needs larger jets than a H2 when using a H2 carb,and reeded engines need a bigger jet as the airspeed is slowed by the reed block. This is also why when one replaces a normal reed with say a VEE Force, a bigger jet is needed. Increased air speed. :-).
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Post by Walms on Nov 8, 2016 19:59:49 GMT -5
I said my carbs set up for reeds would run lean on Perry's piston port. Where do we disagree again? Lol
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Post by Walms on Nov 8, 2016 20:26:57 GMT -5
Actually I guess we disagree Jorgen!
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