u/drifterig

i have been around scooters my whole life but never really bother to get one, i have always been an underbone guy (honda cub and stuffs like that) even tho i own a motorcycle repair shop and got to work on these a lot, my cousin bought his honda dio a couple of days ago and i realize that these are hella fun so i hopped on marketplace and got myself a yamaha jog, not in the best shape but i dont really care, this thing is way more fuel efficient than anything i own and is perfect for short runs to the local part store, the under seat storage is so big lol

cant do much about the flood, might aswell enjoy it

corkscrew pump thats keeping my small town from flooding, a whole 4cylinder mechanical injection diesel engine and trans off of some kind of pick-up truck, i guess if revving it up isnt enough they can also just shift it up lol

this shit does work really well, a local 50 laps (3km each lap) long enduro race got a class for 3 speed underbones and i just happen to have many yamaha y80 laying around so i am building them to run in said race, its supposed to be this weekend but the track got flooded so they postponed it

3 went in, only 2 came out running lol

stock bore and stroke because it will have to survive ~200km going wide open, i love long endurance races

theres 2 offroad ones now btw lol

the race i build it to run in is coming up at the end of this month and i had enough testing in to figure out some flaws so i fixed them

-it didnt have enough grip with the small tires i ran before, bought these mx tires and i have these blue aluminum rims laying around anyway so i had the wheels spoked and put the tires on today, they fit great, grip problem is fixed

-the front suspension wasnt really damping anything, added an extra damper, it now take bumps and jumps really nice and is way more controlable in corners

still need to build an airbox and figure out some more stuffs but its going great!

went to a local mud track event as part of the service team, brought my lifted y80 to use as a pitbike, felt like having some fun so i signed it up last minute in the 5 speed 100+cc class, the y80 is 3 speed 80cc so i was definitely the underdog, track was extremely slipery snd peoples were crashing everywhere, ended up taking 5th place home, didnt even think it would finish at all

we went to a local mud track event, i was just part of the service crew, neveresmt to race this time, we brought the white yamaha dt100 with a lot of hope to take home a trophy in dt100 class only for it to blow up on the last test run before the race, my friend (60 something years old btw) on the yellow ts125 still took home a trophy, thought that was it until i was washing the ts125 and saw a class about to run(they were all 100cc+ 5 speed street oriented bikes modded to run offroad, wanted to ride something i ran to the register and asked if i could join on the pitscooter (80cc 3 speed yamaha y80) and ofc they said yes, they get the money afterall, ran back to my pit, put on the boots and my helmet and rode that thing straight to the gate, the track was so slipery everybody was crashing everywhere, had a really troublesome race as i was on street legal tiny tires that barely grip, crashed on the 2nd lap and bent the fuck outta the shifter so i had to hand shift it into 1st and ride the whole track like that, some more crashes from just sliding around but still ended up getting 5th, there were 8 bikes in the class so i guess thats not too bad, this y80 is built to run in another event for the 3 speed underbone scooter class they have running next month, i brought it to use as a pitbike and to test it a bit, never thought it would even run on the track lol, the organizer had a trophy left so they made up another award for fan favourite compettitor and i got that aswell so we went home with 3 trophies, was a great trackday

just having some fun

gonna run it in the 3 speed underbone class at a 50 laps (5km each lap) scrambler race soon, got a lot of work to do still but this thing is a blast to ride

theres a scrambler race coming up and i signed up for the 3 speed underbone class, will be racing againts other yamaha y80, honda c70, suzuki fr80 and some other 3 speed underbones, rebuilt the engine and did some more work, got to test it pretty late because i was working on this thing and other customer's bikes through the day, it worked great going through mud and gravel which is most of the scrambler track im gonna run is made of, still a lot of work to get done, better foot pegs, front brake lever, an airbox, an additional front damper, gonna be a lot of fun for sure

did a cdi conversion on this early 80s yamaha y80, it was originally on points ignition and those dont like water which i will have to go through on the scrambler race im running, used the stator from the last revision of the y80 that was one of the first cdi system yamaha ever ran, gutted the charge/lighting coil to save some weight and reduce drag on the flywheel magnet, made a wiring harness to run a late 90s yamaha y111 cdi unit for higher rev and better suited timing graph since this thing is ported, gonna be testing on the track really soon!

theres a scrambler/enduro event coming up and im building this to run in the 3 speed underbone class, theres gonna be some 3 speed honda cubs like c70 and some suzuki fr80, 50 laps, gonna be hella fun

added a frame brace and swing arm brace because this thing have some rust holes, also flipped an aftermarket suzuki rc100 exhaust up side down and made it fit, all done by my local fabrication/exhaust shop, he did all this in 3 hours

50 laps around a mostly dirt track with a mud section and some jumps, im signed up for the 3 speed underbone class so theres probably gonna be honda c70 suzuki fr80 and some other 3 speeds, still got a lot of work to do but its coming together pretty nice

(last 2 pics) it was slammed to the ground a while back and i used it as a daily for like 2 weeks until i realize it fucked my back up so i parked it ever since, its nice to turn it into something ridable again

there was a class at this mx race thats for underbones, heard of it the day before the race so i decided to turn a bone stock yamaha y100 i had into whatever this is, did it all that night and went to the track the next day without any testing at all, managed to get a trophy simply because 3 other guys in my class broke lol

i used to ride enduro dirtbike about 6 years ago and left the hobby behind, i actually got another underbone race coming up at the end of this month but its for pre 90s 3 speed bikes so im building a yamaha y80, gonna be a lot of fun!

some random guy in the supercub subreddit told to to take it off the public road after i posted a video of this thing going 160km/h so i guess im just gonna be riding it on this private gravel road now

my 1996 yamaha mate 111 2stroke, currently my daily rider, slightly modded engine with 2.5mm oversize bore, shaved head for higher compression, ported exhaust port, 24mm carb, advanced ignition timing and 15-32 sprockets, still completely reliable and daily usable but will go fast if i wanted to

1996 yamaha y111, bought bone stock to use as a grocery getter but i couldnt stop my self so i ended up with a grocery getter that peg the speedo out, i really hope someone peg me too smh

ported cylinder, 2.5mm oversize bore, shaved stock head for higher compression, 24mm carb, advanced ignition timing, 15-32 sprockets, still running stock exhaust and an opened up stock airbox, 100% street legal but haul ass