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Mar 12, 2016 21:14:05 GMT
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guys what would be the right type of bike carbs I would need on a 1300 cvh. its a stock engine just fully rebuilt have a distributor with vac advance so I believe all I need is the carbs,manifold (with vacuum outlets for the dizzy), and a bike carb fuel pump! would cbr600 Honda carbs be okay - what jet sizes would I need in them to run okay in a 1.3 cvh?? fancy a bit of noise and to replace the rubbish weber single carb set up I have! thanks in advanceeee  |
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Last Edit: Mar 12, 2016 21:17:58 GMT by slammage
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Kieran
Posted a lot
Posts: 1,092
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Mar 12, 2016 21:56:33 GMT
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I ran a set of 33mm mikunis from a FZS600 fazer on a 1.4 and a1.6 k series and they were great.
Mount nearly horizontal too, unlike most semi down draft bike carbs.
Sounded like this on the 1.4
Idle mixture screws 2 turns from fully seated, needle clip on the bottom groove with a washer under, mains drilled to 1.5mm
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The Ashby Jackson fleet:-
1979 Mini Clubman 1.8 K series
1978 Skoda 110r Project 130RS K-oupe
1978 Austin Allegro 1500 SDL Estate
1984 BMW K100 Sidecar outfit
1999 Yamaha FZS 1000 Fazer
1991 Kawasaki ZXR400 race bike
2002 Kawasaki ZX9r race bike
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Kieran
Posted a lot
Posts: 1,092
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Mar 12, 2016 21:59:37 GMT
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The vac advance for the dizzy wants to come off just above the Venturi, no provision is on bike carbs usually, so just blank it off.
If you tap into the runners, the vac signal is good for a map sensor or brake servo, no good for the dizzy. It's too strong and will just pull the advance unit to full advance at anything below full throttle.
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The Ashby Jackson fleet:-
1979 Mini Clubman 1.8 K series
1978 Skoda 110r Project 130RS K-oupe
1978 Austin Allegro 1500 SDL Estate
1984 BMW K100 Sidecar outfit
1999 Yamaha FZS 1000 Fazer
1991 Kawasaki ZXR400 race bike
2002 Kawasaki ZX9r race bike
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Mar 12, 2016 23:29:32 GMT
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The vac advance for the dizzy wants to come off just above the Venturi, no provision is on bike carbs usually, so just blank it off. If you tap into the runners, the vac signal is good for a map sensor or brake servo, no good for the dizzy. It's too strong and will just pull the advance unit to full advance at anything below full throttle. oo never knew those carbs existed ! and because they can be mounted nearly horizontal that's a bonus for ease of making a manifold as well. yes I must of got confused there I shouldn't be needing any vac advance from the dizzy as you say. what intrigues me is setting them up. what exactly do you mean by needle clip on the bottom groove with a washer under? sorry to ask I am new to these bike carbs I presume you mean the float needle? and why did you do that? I know I wont necessarily need to do that but its nice to know thanks for your video and reply |
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ChasR
RR Helper
motivation
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Club RR Member Number: 170
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Be aware that over a modern 16V you'll have heavier fuel requirements for a given engine size. If stock the the CVH head was not the best flowing of things . |
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Kieran
Posted a lot
Posts: 1,092
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Mar 13, 2016 19:02:56 GMT
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The carb slide has a needle (like an su) that takes care of the midrange fuelling.
The needle has 5 grooves with a circlip, to set the height. Lift the needle (lower groove) to richen, lower to weaken.
I found I needed the needle higher than the bottom groove would allow, so shimmed with washers.
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The Ashby Jackson fleet:-
1979 Mini Clubman 1.8 K series
1978 Skoda 110r Project 130RS K-oupe
1978 Austin Allegro 1500 SDL Estate
1984 BMW K100 Sidecar outfit
1999 Yamaha FZS 1000 Fazer
1991 Kawasaki ZXR400 race bike
2002 Kawasaki ZX9r race bike
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Mar 13, 2016 20:28:21 GMT
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id be looking at suzuki bandit 1200 carbs, think they are 34mm venturi.
the needle is operated by a diaphram that lifts with vacuum,
bike carbs have a idle jet which is usually upto quarter throttle
the need jet then controls from there to about three quarter then your onto your main jet
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Kieran
Posted a lot
Posts: 1,092
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Mar 13, 2016 20:47:05 GMT
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Bandit 1200 carb's are 36mm, a bit big for a 1300 8 valve car engine.
Would work, but the throttle response would be not as good as smaller carb's.
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Last Edit: Mar 13, 2016 20:47:57 GMT by Kieran
The Ashby Jackson fleet:-
1979 Mini Clubman 1.8 K series
1978 Skoda 110r Project 130RS K-oupe
1978 Austin Allegro 1500 SDL Estate
1984 BMW K100 Sidecar outfit
1999 Yamaha FZS 1000 Fazer
1991 Kawasaki ZXR400 race bike
2002 Kawasaki ZX9r race bike
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