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  1. G

    budget sv650 cafe racer

    I broke down on my test ride last week I think I found the problem. I lost the vacuum plug I was using on a T piece on the hose to the petcock and in my impatience I used a screw to block it. But it did a bad job. I found it using a hand vacuum pump, Unfortunately we are in lock down again so I...
  2. G

    budget sv650 cafe racer

    I spun the carby 180deg now opening towards the rear cylinder and idling at 1400rpm, pulling the front and rear plug both plugs had similar effect but the idle exhaust sound was not even. So it looks like it will be worth making an adapter to run the throttle across the plenum.
  3. G

    budget sv650 cafe racer

    I just fitted a 3/8 id balance tube a fraction larger than the first one and I didn't notice a change but the idle still fluttering on the rear can now go down to 1600rpm which is almost a win except spluttering between 1600 and 1800 will equate to a flat spot. So I will try to fine tune best I...
  4. G

    budget sv650 cafe racer

    I just fitted a balance pipe and although not the magic bullet I hoped for it has defiantly changed things for the better. I can now get a stable steady idle at 1800rpm with just a bit of fluttering from rear cylinder misfire. Any slower and the rear cuts out. no stopping and starting the rear...
  5. G

    budget sv650 cafe racer

    It seems the rear cylinder is running lean at low rpm I suspect I its to do with the uneven firing order the air/fuel mix has more time to stagnate and stop flowing as opposed to the front where the flow is still going stared buy the rear. I am thinking of running a 12mm tube from the manifold...
  6. G

    budget sv650 cafe racer

    after using sealant on everything and putting a temporary deflector under the carb towards the rear still no go but the rear is lean?
  7. G

    budget sv650 cafe racer

    Just checked valve clearances right on spec min clearance, ideally I would have liked a couple of thou more but I am ruling that out. I think that just leaves my manifold ether still leaking or design. so first step putting non hardening fuel resistant sealant on all mating surfaces. then if no...
  8. G

    budget sv650 cafe racer

    Rear cylinder is still not playing the game. With idle set 2000 rpm It idles 5 seconds then the rear cuts out And runs on the front for 10 seconds at about 1000 rpm and keeps doing this. "Seems" to run ok 2500 and over. The coil checked ok I put a wire across from the + front coil to the rear to...
  9. G

    Saying Hi from Australia as I start my first cafe racer build

    It handles great the geometry is still conservative when compared to how high racers raise the tail on these bikes. the rear is standard height with shorter dog bones to compensate for the 8mm shorter shock. And the front as you saw it is pushed through 38mm and has a .90 spring, a gold...
  10. G

    budget sv650 cafe racer

    We did well, the the water tanks and the dam are full.
  11. G

    budget sv650 cafe racer

    I through myself a curve for a couple of days by not pressing to rear of the manifold all the way home. but I should be back on track now.
  12. G

    budget sv650 cafe racer

    Success is not guaranteed This is not paint by the numbers. This item was not sold equipped to suit the bike. These were sold pre setup for an application but could easily suit similar applications. This is far from a chevy 6 but it is coming together. I fitted the spray bar with smaller fuel...
  13. G

    budget sv650 cafe racer

    Ok. Time for an update, If idle speed is correct too much fuel is being delivered thru out the whole range. If I adjust for a 3500 rpm Idle I can get it all good. So I am going to try a 2nd spray bar I have for the 100 hp version which has smaller holes I am not sure of compatibility with this...
  14. G

    budget sv650 cafe racer

  15. G

    budget sv650 cafe racer

    My air filter just arrived and I am booked in for dyno tuning 14 Jan 21. It took a bit to find a dyno operator willing to try something a bit different. some wont look at anything that is not EFI. I have worked out the throttle linkages but havn't fitted them on yet.
  16. G

    hey all,I'm new here

    Welcome. Sounds great. keen to see what you come up with.
  17. G

    Saying Hi from Australia as I start my first cafe racer build

    Just posting a recent pictures before the final stage, there is more info elsewhere on this site.
  18. G

    budget sv650 cafe racer

    Its a fish "carburettor" an early rethink of fuel induction designed about 1930. It is a mechanical map sensor that compares MAP against at atmospheric pressure and dispenses the correct amount of atomised fuel (whatever the altitude) Using that same pressure difference to push the dose through...
  19. G

    budget sv650 cafe racer

    It's hard to find time at the moment, but this was part of my original cafe racer plan, I thought I had better bite the bullet and start swapping out my carbs for a single mechanical throttle body. So hopefully by the end of the week it will be done. And depending on how well, or not it works...
  20. G

    budget sv650 cafe racer

    new picture
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