New Posts
View groups and posts below.
This post is from a suggested group
Good evening everybody! Is anybody out there who can please give me the measures for the rubber under the fuel tank which has part no. 363-24183-00? I want to print it with my 3D printer :) Thx!
This post is from a suggested group
Where is the best place to find carburetor Jet kits for Yamaha 1969 AT1 125 Enduro?
This post is from a suggested group
New to 2-srokes. A friend gave me a 1972 360, RT2. Going over it and have the manual but it is not clear about oils to use. I have come to believe that the crankcase and gears share the oil for 1972 and 1973. The manual says use SAE 30 two- stroke engine oil. Transmission oil is SAE 10W/30 engine oil for 1974 and later. A 1972 or 1973 is not mentioned. Finally, is the oil for the reservoir two stroke oil. Thank you for any advice, steveb
Hello Steve, and welcome to the forum
Oils have changed a lot since the days when these vintage Yamaha Enduros were made.
What's most important now days, isn't which weight of oil you use in the transmission case (30wt or 10/30wt), . . . it's that you use an oil that is designed for use in "wet clutch" applications. If the bottle or can doesn't state "For Use With Wet Clutch's" or, ... carry the JASO M1 or M2 rating, then don't risk using it . . . otherwise, you'll risk that the clutch plates will start slipping.
As for the oil tank, that's tucked up under the left side of the seat, definitely look for a product that says something like: Two Cycle Oil, or ... 2-Stroke Oil ..... better yet, If the container says ... For use in oil injection systems
Probably easiest to find if you visit any one of the Japanese brand dealerships. They'll likely have a variety of oils that are appropriate for you to choose from
This post is from a suggested group
I am in the market for this bike and know someone who will be restoring it and listing it for sale in a few months. My name is on the list. What would be a reasonable price to pay for a bike like this?
The bike (1969 AT1 125) I am looking at is being restored. I am guessing $3,000 - $3500. In that range. comments please!
This post is from a suggested group
Stumbled upon this nice survivor bike at a customers house. He wouldn’t allow me to purchase it but he was kind enough to allow me to stare at it for entirely too long. Check out the original dealership sticker on the rear fender. Can you believe this one was headed to the dump? So glad he rescued it from the scrap metal yard.
Awesome story of another one saved. For so many of us the JT was our first real motorcycle. Mine was purchased brand new from a man named Syl at Twin-K Yamaha in Mt Clemens Michigan in 1972 for $299 hard earned dollars. So many wonderful memories. I have now refurbished two JTs and I am doing my best to create those same memories for my grandson.
This post is from a suggested group
I share the same addiction with Yamaha Enduros! I had a 125 in 1969 and a 250 in 1971. Love them both and got more than my money's worth from both. On the 250 I rode Enduros all over So Cal as far north at King City, CA and south into Mexico. The 250 never failed me in all of those events! It is an amazing bike and have so many great memories from riding it.
I hope to gain some knowledge from this forum and am glad to be a part of it.
This post is from a suggested group
I know that ebay does have parts & accessories but is there anyone else to contact for this?
Welcome to the forum. It’s depends what you are looking for. Some parts are still sold by Yamaha. Right now, we do have a few reproduction parts for sale (in the store or EBay).
This post is from a suggested group
Any suggestion's on jetting for this elevation?
The best way to jet a bike is by seat of the pants, and reading the spark plug burn.
i can do neither, but I can put you in the ball park.
Before going into, or adjusting the carburetor, the following should be checked ...
clean air filter
de-carboned exhaust pipe (clean and free flowing)
NGK B8ES ... or equivalent spark plug
Points/timing to factory specs
air leaks ... around crank seals and the carb's mounting flange
~ Remove, disassemble, and clean the carb
~ If your vin number is above #003000, purchase a small carburetor O-ring ... part number 93210-04121 >>> if vin is below # 003000, order O-ring # 93210-06120
Because air density is affected by altitude, temperature and humidity, there could be a range of jets and adjustments needed to cover the various conditions.
At 5300 feet, here are my suggested starting points:
~ Winter from -10 to 40 degrees . . . stock 150 main jet, air screw 1 1/2 turns out
~ Spring/Fall from 40 to 60 degrees . . . 145 main jet, air screw 1 3/4 turns out
~ Mild Summer from 60 to 80 degrees . . . 140 main jet, air screw 2 turns out
~ Severe Summer between 80 and 100+ degrees . . . 135 main jet, raise needle clip to 2nd slot, 27.5 pilot jet, and turn air screw out 2 1/4 turns from seated position
Replace the old jet setter O-ring with the new one you acquired, put carb back together, and install
Some small adjustments may be needed to dial it in to the ideal state of tune
Jet part numbers . . .
135 main ... 137-14143-27
140 main ... 137-14143-28
145 main ... 137-14143-29
27.5 pilot ... 193-14142-27
This post is from a suggested group
I have seen this in the Yamaha Riders Manual. Going back to the 1970's I did not use 90 octane and the bike ran fine. Anybody else want to comment on what fuel rating you are using.
.jpg)
.png)
.jpg)
.png)
.png)
.png)
sold individually
https://www.jetsrus.com/a_jets_by_carburetor_type/jets_mikuni_VM_series.htm