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  1. irk miller

    Engine rattle

    Are the carbs perfectly synced and do you have the rpm's really low? Not uncommon for the clutch to rattle when the idle is low and the carbs are out of sync. Get it smoothed out and see if it quiets above 1200 rpms. I put 15k on a CB750 that did the same thing.
  2. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    Getting ready to order a head gasket and base gasket from Lani. Anyone have any idea a good baseline to order the first head gasket at? Do I go thick as stock, like in the .08" range or do what my first inclination is to do and go as thin as .035", maybe? Do I do a squish measurement with no...
  3. irk miller

    Post a pic of your latest purchase

    I mentioned an IT200 trade I made with Hurco in an earlier post. It came with an orange XR tank and a shift lever welded to the shift shaft. Hurco and Mr E were able to find me the right tank at Mid Ohio and I got the parts to fix the shifter.
  4. irk miller

    CB350 / Velorex 562 Sidehack Project for the Boy

    So glad this has a special place.
  5. irk miller

    Low Carb Vacuum Pressure on Rebuilt CB360

    I’d only use your vacuum gauges for balancing the carbs and don’t worry about the numbers a whole lot. Dying on choke typically suggests they are really rich.
  6. irk miller

    Cafe XV920R Mega-Build

    Turned out wonderful
  7. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    I like to use the CB550/750 hubs and GL rims, or the Akront style high shoulder rims for 40 spoke or smaller CB hubs for 36 spoke. I like to use the XS or GL hubs in particular, because I have a setup that matches common spacers, hubs, rotors, and calipers. The GL1000 and XS650 (and RD) front...
  8. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    Man, building something to track can be tight. I have the parts to build 17” spoked GL wheels front and back. Also two to mount now. Maybe that’s a better wheel decision. These Ninja wheels just look cool.
  9. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    Shame on me for not saying Mid Ohio when I listed my tracks. That will happen, I promise, and you will make rounds on it.
  10. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    That'll be great when it does. Crossville is 5 hours, which is basically the same as Barber. Road Atlanta is my local, but even that is 2 hours away. I have a dirt course, Aonia Pass, 45 minutes away I hope to run the Bighorn on when I get it running. That's a big reason I keep leaning...
  11. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    Digging through AHRMA and USCRA rules to see if this thing has a place with the modifications I am doing. AHRMA is pretty much all together out. There is room within a few USCRA classes, but the RD Spec class is out. I'll have to seriously consider whether or not I plan to run USCRA races at...
  12. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    I’ll confirm with Hurco what the deal is with this crank. It’s a good crank. I honed the jugs. The left jug had a bit of aluminum transfer below the exhaust port. I did a little bit of work and got it all cleaned up. I’m running these jugs with stock bore, at least at first. We’ll see how that...
  13. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    Thanks for solving that debate, Teazer. Now I owe Hurco another dollar. I assume you run everything on premix? I finally got the engine apart and cleaned up. I have a spare bottom end that I’m scavenging a few parts from. This engine had a bent shift shaft that needed replaced, for example...
  14. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    Might be some debate about which rad I have. eBay lists these as TZ:
  15. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    The LC head gives you 23mm to make up over the stock studs. We get another 28mm with the XS stud. I think we'll go with an electric water pump. I have a TZ style radiator.
  16. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    Good hands, he says. LOL No biggie, I know, but…
  17. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    Thank you so much, Teazer. I do have Banshee reeds, but I'll look at the YZ. Powerdynamo VAPE igniton and the carbs that came with the bike are VM28. I have VM34 carbs from a snowmobile with a priming bulb on my XS that I'm thinking of moving to the RD. Pulled the cylinder studs, which was...
  18. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    I need to figure out how the tune works on these, particularly at the bottom end. I plan to make it street legal, but I would love to work it out on some road courses. At the same time, I frequent Carolina Dragway 30 min up the road. Even though it will carry the bodywork of a road racer, I'd...
  19. irk miller

    1975 Yamaha RD350(LC) Preservation-mod Hellride

    This project has moved to this location, as it was handed off from brother @Hurco550. See it’s previous build here. I’m slowly taking inventory, doing the research, asking a million questions and prepping parts for the engine. The build officially begins with a paint strip and vapor hone of the...
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