Messages

Installing Gold valves for an RD 350/400 involves enlarging original holes in the steel rod and drilling extra holes in the bottom to increase fluid flow to the valve. That lets the emulator handle the flow control instead of the hole size. Some versions require drilling the cast piston "head" at the end of the rod or cutting off the top.
I don't remember any part of the instruction calling for plugging holes in the steel rod, if that's what you're saying.

https://racetech.com/ProductSearch/12/Yamaha/RD400F%20Daytona/1979

https://racetech.com/page/title/DRod%202-2%20KYB%201970s

They work very well. The install is a little fiddly but not too challenging if you have a drill press.

IR8D8R

Despite the availability of these arms for HD, I don't see them on the KOTB bikes, even though they are allowed. I actually saw one in the wild a week ago on a Sportster or Dyna. Not sure which but it didn't have the usual luggage or batwing bus fairing. Gold anodized parts looked out of place on a Harley somehow.
 I'd have to paint it flat black to keep it from looking weird. Or paint the rest of the bike... I'd be better off with a grungy old DG with some miles on it.

IR8D8R

Trac Dynamics swingarm.
https://tracdynamics.com/products/yamaha-rd-350-400-swingarms?variant=43143530283177.

Anyone try one of these (photo)? They look slick. RD350 arms are same length as stock RD400 +1" over stock RD350.
 The products shown elsewhere and in earlier threads are box tube construction and not billet as this photo appears to be. Their website shows products for the 350 and 400 as well as extended length arms for other bikes.

Not all the reports about Trac Dynamics were complimentary.

IR8D8R

Yeah, but the brake fluid has been flushed prior to the sale. That's gotta be worth what? 4-5 grand?

Maybe has something to do with the popularity of the Grom and Z125? ...or this dude has a garage full of them and is trying to pump the market.

I think I might rather have a 2022 R1 for the same money. Or a really nice RZ 350.

IR8D8R

That is super-cool and I'm not into watercraft either.
 Somehow, despite making aircraft and aero engines for decades, Curtiss-Wright managed to make this powerplant look thoroughly agricultural.
 Apparently this engine was used in a John Deere SN-71 model 400 snowmobile. Described as a Canadian Curtis-Wright 339cc producing 28 hp. There was also a model 500 snow machine with a 436cc version making 36 hp. That is the only other reference I could find online. No photos of the engine itself.

IR8D8R

Kramdua,
If you have the metal tipped fuel inlet needles, try the Mikuni needle and seat set with Viton tips. If you have the rubber tips already they may have hardened. Common issue. Sometimes polishing up the metal needles and seat will fix this if there's a residue or oxidation making them hang. I think the knockoff carb kits have the metal tipped needles. Most suppliers have the option for Viton.
https://www.economycycle.com/shop/yamaha-rd250350400r5ds6ds7-parts/fuel-and-airintake/carburetor-rebuild-kits-parts-related/carburetor-parts-carburetor-rebuild-kits-parts-related/float-valve-assembies/mikuni-viton-tip-needle-valve-assembly-for-rd250350400r5ds7-all-vm24-30mm-carb/.
 My carbs were pissing every other time I stopped and forgot to shut the petcock. Embarassing...

IR8D8R
 

https://asheville.craigslist.org/mcy/d/candler-1975-suzuki-gt250/7670036803.html

Pretty little 75 GT. Price is right $2800. Somebody should go get it.

Not my bike, etc.

IR8D8R

Assuming you are asking about the power valve? This might help:
https://www.youtube.com/watch?v=VAfi_zy2hbc.
The comments on this video were also enlightening. Bear in mind that I know nothing about KTM 125 EXC's. Looks like a neat little bike.


IR8D8R

Any of the Permatex Ultra series. They are not cured with acetic acid (a reaction with water), so they don't stink like vinegar. The Ultra Grey one doesn't look so bad against aluminum as the blue or orange. They are some kind of modified silicone with a little more resilience than plain RTV. They also adhere better and won't separate from the surfaces with oil.

IR8D8R

Ooh. That's trashed. The only part that doesn't look broken is the gas cap.

IR8D8R

That's one way to find out how bad a neighborhood is. By the number of cancelled Uber requests.

Big tip might help.

Cool vid Paul. Sounds just like a Cox .049 model airplane engine in this audio. Like a bee in your helmet at 140mph.

I could watch this all day. Tickled my neurodivergent squirrel-brain activity.

IR8D8R

Compton is a place you drive through in daylight with the windows rolled up and the doors locked. Like East Oakland and parts of Long Beach. There's always someone who likes a donut shop or something in places like that. Barbecue... Going into the neighborhoods may not be the smartest thing you can do.

IR8D8R

Internet says there was a factory "trail kit" to change the originally produced SS into a TR with the dual sprocket, fender raising adapter, and luggage rack before they sold 2 models. Looks like the early ones only have the street gearing from the showroom. Then they started selling 2 versions later. Don't know if the kit continued after that or if all the later TR's had both sprockets. The high pipe was the standard. Neat little bike. "Road Runner". Never saw one before.

IR8D8R

Mark,
  You can change the gearing. That's cool. Do you use a chain with 2 master links and carry the extra piece in street mode?
The can above the back of the case is the air cleaner? Sort of a complicated induction route. I tried to look up an engine diagram and discovered that this is also a Kawasaki C-2 TR (It doesn't have a carburetor apparently):


IR8D8R