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Recent content by collinsda

  1. collinsda

    ZXR Flywheel Puller

    Thanks Michael, email sent to you. Dave
  2. collinsda

    Advancing CDI units

    Cheers lads! Thanks Michael, I'll have a look out for one. Dave
  3. collinsda

    Advancing CDI units

    Just wondering if anyone here has advanced a CDI unit. I was thinking of mapping the peak cylinder pressure against crank angle for a race engine I am developing and then tweaking the ignition timing so that I am achieving peak pressure at the optimum angle for a particular RPM range. I was...
  4. collinsda

    ZXR Flywheel Puller

    Does anyone know what size puller fits the ZXR flywheel?? MBurgess, any ideas? The bike is a H1 model. Thanks guys, Dave
  5. collinsda

    Exhaust Link Pipes?

    Thanks a lot guys - I'm still rebuilding the bike at the minute but I'll try that and see how it goes. I'll let you know how I get on. Like you said Rob, I can also remove the 'plug'. Cheers, Dave. PS: thanks for the pipe dimensions Michael!
  6. collinsda

    Exhaust Link Pipes?

    Hi Michael, so should I get rid of the link pipes then? Could you give me the exact dimensions for the primaries & seconadries? Sounds interesting! Are you using the same secondary collector then? Cheers, Dave
  7. collinsda

    Exhaust Link Pipes?

    Cheers Tmoose, yeah, that's pretty much the gist I got from some lit. I found on the web. i was thinking of splitting the pipe and blocking it to see if I found any difference. MB, I think you're right, they're best left alone - the documentation I found was pretty basic but explained the...
  8. collinsda

    Exhaust Link Pipes?

    Thundair, thanks, I've been keeping an eye on that forum. Cheers. Mike, if you had read by post properly you would see that I am financially restricted to the amount of development I can do on the engine. My question was about link pipes, not whether the bike will be competitive...
  9. collinsda

    Exhaust Link Pipes?

    Hi, just wondering if anyone has any opinion or info on this... I am currently building a race bike and due to limited budget I am going to be using the stock exhaust system. Firing order is 1-2-4-3 and the downpipes are linked 1 to 4, and 2 to 3. The collector is a 4-2-1. The cam profiles...
  10. collinsda

    Building up intake runners - Epoxy??

    That's great lads, cheers. EHudson, no, the small holes are just porosity in the head - from the manufacturing process I'd imagine. Do you not think they are worth repairing? It's a race engine and I am concerned that tiny 'pockets' like that in the cylinder head would be a source of...
  11. collinsda

    Building up intake runners - Epoxy??

    Found the thread I was looking for on the site. Thanks.
  12. collinsda

    Building up intake runners - Epoxy??

    Hi all, just a quick question about building up areas of the intake runners etc... I was just wondering if anyone could recommend a particular type/brand of epoxy or another suitable substance. I know a lot of engine builders use epoxy for this but I don't know which type and I'm reluctant to...
  13. collinsda

    ZXR400 Cam Info.

    Thanks guys - actually found it at the start of the manual... what an idiot I am! ;) MB, just prepping a racebike for next year but intend sticking with standard cams for the time being. D.
  14. collinsda

    ZXR400 Cam Info.

    Hi all, hope someone can help here. Have scoured the net for this info but to no avail :( I'm look for cam lifts, durations & opening times for a ZXR400-H. An older thread by MBurgess yielded the lifts & durations (thanks!) but just wondering if anyone (Mburgess ;) ) knows when they open...
  15. collinsda

    Bolt Clearance holes

    Hi Roseda, I would imagine it has something to do with the disproportionate increase in the thread pitch with the diameter of the screw/bolt. For tightly toleranced holes the hole clearance will increase (to a point) with the diameter of the pin/locating feature for ease of assembly.
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