r/2Strokes

Derby area Front fork seals have started weeping on my son’s TZR. Not a job he can do and im in Manchester Any trusty bike mechanics in the Derby area

Hi, i have a d50b0 engine in unkown condition, except that crank, bearings, cylinder etc is new. When driving it runs perfecr, except for smoking a lot, and not revving out for some reason / cutting ignition. Ive changed plug, main jet, cdi, reeds, fixed ground etc but still runs bad.

Ive added a video of it running, aswell as a picture of the sparkplug. If to any help, the water pump gear is broken aswell.

Thanks in advanve!

I have replaced my Original exhaust pipes with these Martin Johnson pipes and Tyga silencers.

I've used lots of coats of high temperature, clear lacquer.

Hopefully they will look ok for a while, but may have to go back to back at some point.

Should I keep the originals as spares?

So my mechanic said the piston was damage and intake and valves are hitting the piston but I asked them they don’t know why. So I would like to ask your personal experience and thoughts on this.

Because I usually ride it normally no crashes. My bike is cbr150r 13k km. I change oil every 3k km. I ride it everyday to work.

I would like to know what causes this to avoid it.

just picked this bike up, i need a new float and carb rebuild kit, but I cant find any info on the carb model, can anybody help me out?

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!

Yamaha 30DEO 2 stroke from 2000s, runs but I was never happy with idle. Today I pulled all 3 mixture screws, top and bottom have flat end, middle one is pointy. What I am thinking:

1. It should be like that (unlikely)

2. Top and bottom were sometimes overtightened in the past by previous owner, and the pointy end snapped.

3. Middle screw was replaced by incorrect screw.

What I've found, originals are super hard to find and quite expensive, are aftermarket parts available?

Stripped this because I forgot to remove the nut before using the puller. Rookie mistake. Been fing up like crazy on these mopeds. Anyone know what I should do. I was thinking of using extractor sockets. 14 and 15mm no longer fit 🫩

I got this quad for free from my neighbor, and I always had this issue of it shutting off after 20 mins, so I did a compression test and found that I only have 90 lbs of compression. Granted, the engine was cold, but that’s also the only way to know, because it doesn’t really run at the moment.

I’d just like to get it running as cheaply as possible, I don’t need to make 130 lbs of compression or anything like a new motor, I’m not racing it, and I’m not using the quad for work, just as a cheap trail rider. I just would like to know where I should go from here.

It looks like it’s had some pretty bad piston slap, the piston skirts are pretty worn and the block also has some chatter marks but nothing that catches a fingernail. A local shop said that I should just hone it and throw a new piston in, but he didn’t look at the block with a bore gauge. I also noticed some shallow pitting near the bottom in the cylinder.

So should I just get a new 72mm piston, a new jug and piston, or rebore the stock jug and get an overbore piston? I feel like to get it running cheaply a hone and new piston isn’t a bad idea, but I’d like to hear some advice from you guys! Thanks in advance

Its a 2009 yamaha r6 let me know what kind of sound is this?

Hopefully this video fits the subreddit. On my channel I make odd stuff, this was a video from last week. I'll have a video posted in a couple days here in regards to my newest build. Shooting for under 10 lb, ability to fit it in a backpack and without the use of a welder. Should be pretty fun!

just bought this bike and i dont know if its normal that the exhaust moves that much

I have a Suzuki TSR 125 from 1993 that has 18,000 km and that I haven't been able to ride mostly because I wasn't with it but also because it's having problems.

As I said in the title it won't idle even though I completely clean the Jets of the carburetor.

I tried a different spark plug from my rieju mrt 50 sm from 2022 which has the same model spark plug but it still had the exact same problems.

It also won't rev past 6000 RPM and sounds horrible when I'm in neutral. Video attached of me trying to. Doesn't work in gear either.

Previously, I had a problem with the valve seat o-ring not sealing so it would flood and I was able to fix that and then this popped up which was hidden behind the fouling spark plugs.

Could be maybe the stator or the CDI I'm not sure exactly what could cause this.

Here is a link to someone driving the bike to know what it sounds like normally: https://www.youtube.com/watch?v=MiLdA6IqFwE

And him reving it in neutral: https://www.youtube.com/watch?v=yP8dM79xYWI

Also, i don't have a tool to measure compression, i have a multimeter, I have tools to change things myself which is what I want and will probably do.

Edit: the engine has a power valve that is supposed to open at 6k, if that has anything to do with it. Since the bike was flooding, I'm sure it's full of carbon as well, maybe the power valve is too.

I have been working on my Tuareg (Rotax 122) over the past few months (most of that time trying to find parts) after reassembling I cannot get her to run for more than a 20 seconds and only really with choke. Before I took the bike apart it ran like a dream so I’m trying to figure out what I have upset! I have taken the carb off and cleaned it put in a new air filter, fresh fuel and two smoke oil, cleaned the powervalve, decoked the exhaust and a couple other bits. I’ve tried taking the carb off again and I can’t see a blocked jet, I took the air filter out as I thought the new filter is chocking it but now I’m thinking it must be fuel. I’m thinking maybe the carb has an issue with the float or a fuel line has given up. It has a delloroto phbh28rd if that’s of any help. If anyone can suggest something as Ive hit a brick wall in thinking that would be amazing!