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Thread: Bike Carbs On A Pinto

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    Cool Bike Carbs On A Pinto

    Before I start, I don't know all the ins and outs, but it took a lot of searching and hassling people (Thanks) to get the info required to fit mine, so thought I would put it into a post and maybe help someone else thinking of the swap

    I found a set of second hand carbs on eBay, and they came with a Boggs brothers stainless manifold already attached, so it was a bonus.

    If you aren't so lucky, the manifold came from a place called Boggs Brothers, and they make it to order. Very helpful people also, they answered many questions that I had!

    The carbs I used are off a Yamaha R1, and seem to be a well recommended carb.

    Some pics of the setup I bought...






    I was lucky that mine came with an air filter also! The filter is a Pipercross PX600, and if you search that on eBay you can buy it, and a special backplate for bike carbs also />

    The next step is to get the fueling sorted. Again, I hit it lucky as my setup came with the Yamaha R1 bike fuel pump, and I wired this up to the yellow wire on the ignition switch, which is an ignition live. I also put an inline fuse on it just to be safe. If you want to be really smart... You can also put an immobiliser somewhere secret on the fuel pump wire if you desire.

    I mounted the fuel pump at the petrol tank, as I am informed that the pumps are better at 'pushing' fuel instead of 'pulling it' to the engine bay.



    A lot of people use the pinto fuel pump, and an inline regulator set at 2.5 PSI! I simply kept my pump in place, but removed the wee pushrod from behind it, that way it's not pumping flat out all the time. I also blocked off the pipes to ensure no dirt got in if I ever want to use it again />

    I bought a universal exhaust bracket from a motor factors, and it fitted the pump diameter perfect! I then used 2 nuts and put the bracket on the long thread on the end of the fuel tank strap bolt, and tightened it up so it couldn't move. I took the old flexi pipe off the fuel sender, and put a new pipe into the pump, and a new pipe then from the pump to the rigid pipe which takes the fuel to the engine bay.

    The R1 pump has no labels for inlet and outlet, so for reference sake, the one sticking straight up is the inlet, and the curved one is the outlet!

    I then put an inline filter in the engine bay, and the fuel pipe goes onto the brass fitting on the underside of the carbs.

    On the manifold I got, there is a takeoff for the brake servo, so this had to be connected up also.

    The actual manifold connects to the head with a standard inlet manifold gasket!

    Now, that's fuel, and brake vacuum sorted... The next thing is the throttle cable. I got a cable with mine, but it wasn't right as it had a balljoint end on it for an escort. I improvised and cut the balljoint off and filed it down so it fits the Capri pedal! I have heard of people using bike brake cables, with a few solderless nipples to hold it in place />

    On the R1 carbs there is a choke slider also, I havnt got round to fitting my cable yet, but it starts ok without it as it's not that cold this weather! A universal choke cable off eBay is what I've ordered and I'll fit it this week />

    Engine breather system... On the weber standard manifold the PCV valve breathes through the manifold again, and recirculates the old crankcase gases. On the new manifold there will be none of this, so an oil catch tank is required.

    I begrudged paying for one, and fancied a go at making one so I did just that...









    The PCV valve pushes into the top of the flame trap, and the flame trap into the side of the block below the carbs. I simply chemical metaled an airline fitting into the top of the flame trap, and ran a hose to my bottle. I also drilled a spare filler cap, And threaded and glued another fitting into it, and ran it to the bottle also. For the top, I bought a filter off eBay for 4 />

    Alternatively, you can cheat and buy these...





    My car started no problem once I had let the float bowls fill up, however it was running far too rich and popping and banging every time you revved. I took it to a local man and he took the top covers off the carbs, and there is a needle in there. We moved the wee retaining clip to the second groove from the top, it was on the middle one from standard. This helped no end, and it's running leaner and driving a lot nicer.

    They sound pretty cool, and they have good power too />

    The timing needed advanced a bit to make them sweet also!

    I intend to go megajolt in the future, and these carbs are handy as they have a TPS built in already!


    A list of all I needed;
    Manifold (carb dependent-made specially by Boggs brothers)
    Carbs - I used Yamaha R1 carbs
    Throttle cable - bike brake cable if you don't get one with it
    Choke cable - universal twist lock jobby off eBay (6)
    Fuel pump - I used the bike pump, as it's the correct PSI and it has an auto cutoff when the float bowls are full also.
    Manifold gasket
    Fuel filter
    Fuel pipe
    Jubilee clips
    Oil catch tank (or make your own)
    PCV adaptor (or make your own)
    Breather hose
    Wire for the fuel pump
    Fuel pump bracket to secure at the tank end.
    Water hose from the manifold to the heater pipe on the bulkhead.


    A few photos of the overall job...






    In this you can see the filter backplate...


    And filter...


    You can see where the throttle cable goes, and also my oil cap breather! I colour coded the top caps for the carbs for the look of things />





    I bought second hand, and I am glad I did! I picked my whole setup (including all extras like fuel pipe etc) up for less than 250. Buying new would be double that by the time you buy manifold, carbs, filter etc.

    I hope I havnt forgotten anything, but if I have I'll add it in!

    Again, I dont claim to be an expert, just trying to assist others if at all possible.

    Thanks for reading!

    Kris

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    Re: Bike Carbs On A Pinto

    Cheers for that mate.
    What did you get the throttle cable off?

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    Mechanic Matt75's Avatar

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    Re: Bike Carbs On A Pinto

    Good write up. I am running the same set up as you.

    The easiest wat to do the throttle setup is to use and universal throttle cable from Burtons or Rally Design - http://www.burtonpower.com/throttle-...d-tcuford.html. Then just cut it to length.

    Again a universal choke cable with a solderless nipple is the way to go.

    One more thing, make sure you use the standard rubber mounts to secure the carbs to the manifold. I used the silicone rubber mounts and they perished in contact with petrol.

    Cheers,

    Matt

    Click image for larger version Name:	20130302_091838.jpg Views:	240 Size:	106.3 KB ID:	70627

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    Re: Bike Carbs On A Pinto

    [QUOTE=Matt75;2390557]Good write up. I am running the same set up as you.

    The easiest wat to do the throttle setup is to use and universal throttle cable from Burtons or Rally Design - http://www.burtonpower.com/throttle-...d-tcuford.html. Then just cut it to length.

    Again a universal choke cable with a solderless nipple is the way to go.

    One more thing, make sure you use the standard rubber mounts to secure the carbs to the manifold. I used the silicone rubber mounts and they perished in contact with petrol.

    Cheers,

    Matt

    Attachment 70627[/QUOTE
    Thanks for that matt

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    Moderator+ Turbosport Moderator Longman's Avatar

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    Re: Bike Carbs On A Pinto

    Good thread mate,

    Is the Pinto standard? If so what's the difference in driveability/power delivery like compared to the Weber it would have (presumably) had on before?

    Cheer,
    Ad

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    Re: Bike Carbs On A Pinto

    [QUOTE=bigm21;2390575]
    Quote Originally Posted by Matt75 View Post
    Good write up. I am running the same set up as you.

    The easiest wat to do the throttle setup is to use and universal throttle cable from Burtons or Rally Design - http://www.burtonpower.com/throttle-...d-tcuford.html. Then just cut it to length.

    Again a universal choke cable with a solderless nipple is the way to go.

    One more thing, make sure you use the standard rubber mounts to secure the carbs to the manifold. I used the silicone rubber mounts and they perished in contact with petrol.

    Cheers,

    Matt

    Attachment 70627[/QUOTE
    Thanks for that matt

    Good pointers there mate, as said Im no expert . I am on the standard rubber mounts, and was actually going to buy a new set of silicone ones, Im glad I didnt now! Are there any alternatives that look good but are up to the job available?

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    Re: Bike Carbs On A Pinto

    Quote Originally Posted by Longman View Post
    Good thread mate,

    Is the Pinto standard? If so what's the difference in driveability/power delivery like compared to the Weber it would have (presumably) had on before?

    Cheer,
    Ad
    The pinto is standard bore, but I have a few bits and pieces done to it.

    Full spec is;
    Standard bore 2.0 Pinto
    Electronic Ignition
    Yamaha R1 carbs
    4-2-1 manifold
    Stainless exhaust
    Injection/unleaded head
    Fast road cam

    I fitted the head, camshaft and carbs at the one time, so its hard to tell exactly what difference the carbs on their own make... but overall the change in power is good! I had a Weber 38DGAS on before also, so I havnt had a 32/36 weber on it in a good while.

    Thanks
    Kris

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    Re: Bike Carbs On A Pinto

    I've also done this conversion, using ZX6R carbs rather than those mentioned above. Swapped from [badly jetted] weber 40s to well jetted bike carbs and it's excellent. Pulls cleanly, good strong power, highly recommended

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    Re: Bike Carbs On A Pinto

    I had the silicone ones and they worked OK but when they get fuel on the outside they will deteriorate and crumble.

    When Bogg Bros made my manifold they machined a grove around the manifold to allow the standard mounting rubbers to fit over and hence not be able to come off.

    Personally I wouldn't use anything else to mount them.

    Cheers,

    Matt

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    Re: Bike Carbs On A Pinto

    For those who haven't got the mounting rubbers, fastboydan or Danst engineering will supply you with fluro lined silicone hose, its fuel resistant and also comes with 4 standard clips and 4 narrower ones for the carb side.

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    Re: Bike Carbs On A Pinto

    Hi, would you have any drawings regarding the big hose on top of the carbs? is it a vacuum hose? do i tap it on a vacuum line or do i leave it as is? Thanks

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    Re: Bike Carbs On A Pinto

    You can plumb it back into the overflow tube back to the tank but I just left mine open.

    Cheers,

    Matt

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    Bike Carbs On A Pinto

    Quote Originally Posted by Matt75 View Post
    Good write up. I am running the same set up as you.

    The easiest wat to do the throttle setup is to use and universal throttle cable from Burtons or Rally Design - http://www.burtonpower.com/throttle-...d-tcuford.html. Then just cut it to length.

    Again a universal choke cable with a solderless nipple is the way to go.

    One more thing, make sure you use the standard rubber mounts to secure the carbs to the manifold. I used the silicone rubber mounts and they perished in contact with petrol.

    Cheers,

    Matt

    Attachment 70627
    Glad you posted the link for the throttle cable as I've been looking all over for one. Cheers 👍

    Sent from my D5503 using Tapatalk

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    Re: Bike Carbs On A Pinto

    Thought I might add the universal throttle cable from burtons which has the end on it for the balljoint will fit a bias pedal box if you cut the end down and the taper locks into the pedal nicely
    Keep her lit

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