Yamaha RD125 Twin w/custom Chambers.

  • 🎬 Video
  • ℹ️ Published 11 years ago
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Yamaha RD125 with custom TA125 factory Works race pipes installed.

💬 Comments
Author

The first bike I ever owned, exactly the same. Cheap on gas and got me everywhere I needed to go, faster than most 250cc bikes of the time.

Author — cayminlast

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Thanks man! Those are custom made/fit chambers originally designed by Yamaha for their early 70's factory racer, the TA125. Jets are available but I drilled mine out instead....ended up too rich so I drilled holes in the airbox till the A/R ratio fell into place. The bike ran great but bad to be ridden like it was racer from the 60's and 70's. The All of my bikes still run the factory oil injection. It simply works too good to eliminate it which gets done all too often.
Cheers

Author — ColdSmoke

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All of the Yamaha RD series were wonderful bikes. When I got out of the Army, my dream bike was a bright orange RD 400, dual discs, 6 speed, but I rode it in the rain, and it only wanted to GO (!) so the dealer talked me down to a more sedate XS650 4 stroke twin. Yeah, it was a nice bike, but the RD was a giant Slayer! Still wish I woulda bought it.

Author — patrick young

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One of the sweetest sounds EVER !! Thanks for sharing !!!

Author — Tony Reynolds

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very nice mate... when i had my RS100 back in the day i always wanted one of these... looked so much nicer than the 125LC.. and yours is a lovely example... stay safe fella :)

Author — Endless Form Most Beautiful

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Wow ! looks fantastic and sounds even better ! well done ! ;o)

Author — Nic Nak

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Excellent RD125. I have a 1975 RD125 that I am rebuilding along with 2 RD 350's as well. Love these 2 stroke monsters. Can't wait to ride the RD125 after it's done. Very light bike.

Author — jewelrycasa

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Its a fancy Yama-term for reed valved which uses a 5th boost port as well. Yamaha single handedly put reed valves back on the map to this day with the introduction on this "torque induction". Cheers

Author — ColdSmoke

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Thanks for the 'heads up' Adam. I'm getting old, and the 'cafe racer' style is uncomfortable for me. I would love an RD125 like the one in this video. I'm probably dreaming to think I will find one in such pristine condition!

Author — AudiophileTubes

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I have the same bike, and the same pipes Im pretty sure. Question for you: did you do anything to jetting to get these tuned right? Jets are a PITA to get. Also, do you run the oil pump or use premix? Killer look/sound.

Author — Daniel P

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where did you get these expansion chambers?

Author — Theodore Bueno

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Thanks for reply! So your still running the 18mm Teikei carbs? Man good on you, did you use a precision drill to drill out the carbs? I have unipod filters and similar pipes I want to put onto my bike, but will def need jetting. Trying to gather all the info I can!

Author — Daniel P

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I've got a 97 ke 100 I ride around in NY I'm 19. Love old school enduros. My body's got a 77 ke 100 wee Resurrected as well.

Author — Douknowgregg

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i have a little RD60...love the entire RD line.

Author — spartylawyer1

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Wow, how fast will it do with the tuners on it?

Author — ironcast

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Nice, I got the exact same bike, same year and color. I'm rebuilding it, I tested only 90psi compression on both cylinders after the bike's been sitting for over 25 years. The piston and bore have very little wear on them, only 1500 KM. Did you rebuild the engine?

Author — remytv

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Yup, I always used the stock 18mm Teikei's With Airbox. Without an airbox, you are in for an endless headache of melted pistons and you'll ultimately find out that the bike is un-tuneable...Put the airbox back on or get one from e-bay with some new stock replacement foam filters from Uni, then you're off to a good start. Jets are available but expensive..Google search "Teikei main jets" or you can drill like I did. PM me for more.

Author — ColdSmoke

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thats wote i love....tanks for sharing....

Author — schummiehugo

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@hyperpunjabi lol- The 1973 Yamaha TA125 racer exhaust blueprint that we made these pipes from of course had no silencers and these were put on as after thoughts. Cheers

Author — ColdSmoke

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Wish we had smaller displacement bikes like this here in the U.S.

Author — AudiophileTubes