Posts Tagged 'sr250'

Projects

Finally got everything from SF. Now to get organized and get busy!
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This isn’t all of them, there’s still the Motobecane VLX, Critical Miss, HobBAD Sparkle Butt, Ciao Ciao and the other DR350. But now everything’s more or less in one place and I’ve got my tools. I’m stoked!

dirty fork and a couple small things for the sr

i’ve not posted much lately because i’ve been mostly tweaking my ninja. i don’t know if anyone really cares about me and my 09 er6f, so i haven’t really bothered. if you DO want to hear about it, let me know!

anyway, i picked up this all-in-one handle bar switch thing for the sr. it’s got everything but a start button on it. if the bike were mine, i probably wouldn’t bother with half of the electrical stuff, but it’s gunna be L’s and so i say it needs it all.
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i’m was a little bummed that it doesn’t have a start button on it as i didn’t plan on having any other buttons or switches on the bike, other than the ignition switch.
so why not a keyed ignition with a start position? it works like one you would find in a car, you turn the key to start and it’ll crank the bike over. you let go when it fires up and the key springs back to the on position. why don’t motorcycles use this style of ignition anyway? the only thing i can think of is they want you to be able to start the bike with both hands on the bars. there’s no other reason i can think of.
the fit and finish of both of these parts are kinda meh, but they are robust enough to hold up, i think. besides, i’m on a $1000 budget for the whole build.

oh, and my fork bits for the dirty moped showed up!
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i’m totally taking this build in a different direction than i started with, and i’m super excited about it.
i also have a yz80 front wheel of the same vintage on the way. one good thing about using old little dirt bike parts is that this whole front end, including front wheel and caliper (assuming i can get one at a decent price), is shaping up to cost me a lot less than a set of hydraulic ebr moped forks, and these are much better quality.

i might be getting fancy with the rear end of the bike. i’m still sourcing parts and trying to make sure my ideas will work out on paper before i commit to spending paper. i’ll fill you in on all that later on though, once i’ve made some decisions.

so yeah. how’s life?

more sr250 parts!

well ok, just one new part. the vm32 came yesterday! it’s a super rad little carb. screw top and main jet access on the bottom of the float bowl’s going to make it a cinch to tune, too!

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probably the best part is that it fits right on to the stock intake manifold, which is still nice and supple after all these years.

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the only thing really holding me back from throwing this bike together with what i’ve got and riding it around is my wheel situation. i really want to go 18’s front and rear, but rims are so expensive. i think i might be better off scouring ebay for 36 hole dirt bike rear wheels that aren’t totally beat and re-purposing the rims, you can usually pick one up for around $50. that’s like half the price of a single aftermarket rim.
actually, i think i might do that. i’m trying to keep the total price of this bike under $1000. original purchase price, all parts, paint, reg, everything. i’m totally on track to making my goal, but i gotta be careful and buy cheap everywhere i can!

sr twofiddy parts

i’ve had most of this stuff sitting on my desk at work for quite a while now. i’m nearly done collecting parts!

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progressive 340mm shocks with 70/120 springs, new fork seals and gators (wipers aren’t available in 31mm apparently), shorty sausage muffler, new keyed ignition and a fancy shorai battery! i also got some super big alum dirtbike bars that i don’t really like, so they won’t be sticking around.

once i had the bike running okish, i started to tear it apart. this is how it’s currently sitting on my lift.

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my buddy/coworker tony gave me a chain and i threw it on before i got it running. there was no way i was going to ride it around with the stock, mostly rusted solid chain.
he gave it to me because it’s been sitting on a shelf for years as most modern bikes don’t have such short wheelbases as older bikes like the sr. since we haven’t been able to sell it for the last 10 or however many years he’s had it sitting on a shelf, he said if it fit i could have it, and it fit perfect! i only had to cut one link out! also, look at that wacky sprocket.

i’m going to build my own wiring harness, mount the ignition in the frame under the seat, probably chop the frame off behind the shock mounts and weld in a loop of sorts and cut off the passenger peg loops and other tabs i won’t be needing.

i have a mikuni vm32 on the way to replace the leaky stock cv unit. i’ll probably be running a uni filter because, while they look cooler, k&n filters suck. the carb, filter and pipe will be all of the “performance” stuff i’ll be doing to the bike, and i’m only doing that stuff out of convenience.
the stock aribox is ugly and takes up the whole under-seat frame area.
the stock carb is leaky and will flood the engine, even after adjusting the float height and replacing the needle. rebuild kits aren’t available, and while i could buy each piece individually, it would be a pain in the butt. the vm was like $60 new, and it means i get to toss the cv carb. i hate cv carbs.
the stock pipe is rather rusty, and has a goofy pancake muffler that takes up the space under the swing arm between the rear tire and engine, the space where i want to relocate my battery box. i am, however, reusing the header.

i cut the baffle off just past the weld, making sure not to cut all the way through.
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my cheapo jcwhitney muffler fits perfect!
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i mocked it up on the bike.
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i think it looks great, and gives me the space i need under the swing arm for my battery box. i’ll probably paint the pipe in bbq black, masking off the muffler cos it’s shiny, and maybe put some red inside the muffler. we’ll see. doing the pretty stuff is a long way off.

i mocked up the general tank too, didn’t get pictures though. i have some interference with the frame and the tank tunnel. not sure if it’ll be worth the work to get a general tank on there. it would look perfect, though! just the right size. we’ll see!

81 yamaha sr250

here is the 81 sr250 i pickd up for L on the day i dragged it into the shop. bought it from a guy for $250, the bike has less than 2k miles on it and was last registered in 81.

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the idea is to strip it down and make it as small, light and simple as possible. L’s tiny, so she needs a small bike to get going on.

really, i would have liked to find her a 125 to begin with, but the sr is a small bike and will hopefully work well for her.

with a carb clean and some fresh gas, i was ripping up and down the ally on it. 30 year old tires and sticky brakes made for a fun experience, and the front of the bike felt like it wanted to twist to the left when i got on the front brake. it’s a total death trap. i love it.

stuff in store-
-strip all that crazy 80’s mini-cruiser stuff off the bike, including the pizza box
-some little mid-rise bars
-low, thin seat
-general 5 star moped tank
-19″ wheels front and rear
-some long shocks out back
-gunna try and reduce travel and height in the forks when i rebuild them (as you can see, they were already pushed way up into the triple trees to make them lower)
-little moped headlight
-aftermarket muff on that pipe
-vm mechanical slide carb (hate cv carbs)
-and more!

(_shitty paint mock up_)
poop
this is going to be a super fun project.


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