elliott911

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Hey guys! long time no talk. so i still haven't ripped this baby open yet- been slammed with my work. anyways, was doing some research and it seems like the crank rebuild on these obscure beasts is a bit ridiculous. HVCcycles quoted me 1000$ which seems very very pricey. do you guys have experience with super hard to find, very pricey big end bearings? and conrods?

Hey Blackhat! thanks for chiming in, I'm familiar with rebuilding 2 stroke bottom ends- usually single cylinder and typically more popular models! i will be following the protocol you mentioned! cheeRS!

Hello friends, anyone have any experience rebuilding one of these bottom ends? basically just wondering if ill need any special tools, anything rare? any pitfalls? or things to know? also, anyone know the size of the seals and bearings- or where to get them? i tried emailing HVCC and they never responded. Thanks!

any leads on affordable expansion chambers? these pipes have got to go!

Hey Dudes!! an update- so unfortunately i didn't do a bottom end rebuild. i was hoping for the best, but i feel like there is definitely a clutch side seal leak. has a smell of tranny fluid burning. will redo the seat soon too. here is an updated picture, not the ignition.. WOOHOO! once again, when i got this bike, it was pretty weird- wiring was a nightmare, a lot of hack job stuff. was going for a modern twist to the classic look, hence the unusual headlight. the main focus is the ignition, and just the engine.

Hey dudes! my bike is pretty stripped of any electronics so i have no indicator of gear, or neutral... not a problem though.. can you guys please help me by explaining me the shift pattern? Thank you.

i saw all the push/pull throttles- but i found one that was all pull!! hopefully start up pics/ vid by weekend.

Hey dudes!! thanks for the informative heads up.. ditched stock cables, eliminated stock cable splitter and third cable. waiting for a dual carb throttle pull to come in the mail-- updates to follow.. soon.

silly question, sorry guys- i just cranked removed the clutch cover.. i feel silly.. please don't flame.

Hello friends- i have a technical question. I have slowly been getting ready for a fire up of my YR1(twin cylinder 350cc) and i have approached the throttle section- obviously there are two throttles for two carbs but i noticed a third cable connected to the clutch side of the crank case. for your viewing pleasure, its #30 on the attached schematic its labeled as, "WIRE PUMP" can someone please explain this to me? is it for the oil delivery system? if so, i have that system deleted and plan to premix. if its for some reason transmission fluid- can you please advise? slightly confused- just curious. Thank you!

best place for performance parts for that bike is as follows https://www.treatland.tv/SearchResults.asp?Search=yamaha+qt50 Best place for answers for that bike: http://www.mopedarmy.com/forums/list.php?1

hey preload! thank you very much for the info, its a great start! as for pictures, here it is the shape i got it: I've completely broken down the bike since, and powder coated it- i do hope you guys approve when i start posting process.

Hello friends-- I'm trying to understand my newest bike the 1968 YR1.. whilst doing this, I've been thinking CDI ignitions to replace the stock system. as the YR1 grand prix is referenced as "the grand dad to the RD350" I'm wondering how much changed in 5 years. does anyone know the engine number/ designation? i also read from the R5 wiki: "The engine cases are similar enough that with modifications, they can be interchanged" Im wondering if this applies to the YR1? without seeing an RD350 I've established they have a different port map, as well as reed valve intake. but are the cases different? is the crank different? ​I've seen this ignition which seems to work for all aforementioned yamahas http://www.ebay.com/itm/New-PVL-Racing-Ignition-System-Stator-Yamaha-YCS1-YR1-YCS-R3-/390573213821 yet, when i searched yamaha yr1 CDI on hvc cycles, the power dynamo is a result: http://www.hvccycle.net/yamaha-rd-r5-cdi-ignition-12v-150w-71-05-799-00/ please advise- any assistance is greatly appreciated!

Hey DT, thank you for that quick response. i really appreciate all points mentioned. your suggestions for the seat will be considered and will be posting with updates!! Glad to be here on the yamaha forums!

since its already been modded, i don't feel so bad tearing down an old bike. the guy that i got the bike from did a bunch of metal work which I'm not terribly crazy about. going to ditch the current seat, though it looks alright- seller gave me the original seat, it is very aged, i will do some leather tooling, and redo the foam. planning to powder coat the whole bike to basically weather safe it from further rusting. just new tires, and hopefully an LED light system. most likely going to go without the honda fairing thing. if you have any desire to have it, we can work that out. would like to ditch the points and get a CDI system for efficiency. with that being said, any knowledge of RD350 case/ crank differences from this application? Silly question, I'm having a hard time getting the chain guard/engine cover off the gear lever- any tips for this?

Hey friends, i recently obtained a new bike. the seller said it was "1968 yamaha R1." i started doing some digging, and its looking like the YR1- sounds like its referred to the granddad to the RD. i was wondering if you guys had any knowledge of the engine/ignition cross over- if any with the RD. here is a picture- ima start rebuilding tomorrow hopefully.

Hey guys!! thank you for the very kind welcoming. I'm stoked to be here.. i recently got a new bike, and i was wondering if you could help me identify it better. i am kinda worried the seller may have chopped it up and used a miss match of parts. i could be wrong, i just can't find much information with what he described it as. "1968 yamaha r1 350cc" is what he called it. the frame number is as follows: R1 11614 it was a killer deal, so I'm not too worried if it isn't what he described.

well stated- my plans are still up in the air. However, i feel like if i could go with another ignition which was much lighter, like a button mag ignition. the potential for low end power would be insane. As far as autolube, i have no problem with premix--- but electric start sounds pretty darn cool for such an old bike. However, still up in the air on exact direction for the bike. is there anywhere i can see progress of your bike, pics etc..? Cheers!

Hey @dirtyDT my apologizes for not making the introduction on the new forum- i was just so excited to talk to other YA6 owners. Just curious, what is your goal with removing the armature? for me- i would really like to ditch the original ignition, and try a more modern CDI type of ignition. When i get my engine back from my buddies shop ill post the VIN, i can't seem to detect one on the frame. Thanks for the reply! yamaha on!

Greetings Yamaha enthusiasts!! I have finally joined the forum! I basically love everything 2 stoke- i recently got a bunch of rust which use to be a Yamaha bike of some sort. most rust has been resolved- now its just putting the pieces together. its a rotary valve inlet engine, single cylinder. toaster tank style. Im looking forward to some day getting it on the road, I'm assuming its an YE6 also Looking forward to learning more about yamahas!

Hey guys! i recently got a bike in pieces- from the research i believe its a yamaha YA6. my guess is based on the following rotary valve fuel feed. 2 stroke. toaster tank. I'm trying to rebuild the bottom end, and I'm trying to remove my armature and i can't seem to figure out anyway to remove it. I've tried everything in my arsenal- nothing works-- @dirtydt, i saw another thread where you had the same problem from back in july of last year. have you had any luck removing the armature? please advise! looking forward to someday driving this bike.