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Post by ShrimpBrime on Jul 26, 2020 13:03:38 GMT -5
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Post by zila1 on Jul 26, 2020 14:56:58 GMT -5
Really cool stuff there Rods. Not only will you clean them up but they will smell real nice too. Love Pine Sol. I use Pine Sol as an insect spray on my lawn and it keeps the cats away too.
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Post by zila1 on Jul 26, 2020 15:00:05 GMT -5
A Batman sticker on the seat would look cool. LOL
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Post by ShrimpBrime on Jul 26, 2020 15:06:18 GMT -5
A Batman sticker on the seat would look cool. LOL Got a ways to go. Got a chain ordered (8mm) with a master link So I can set that up. Gotta pull the axle and set up a brake and a brake pedal on the left. The original version used the brake and throttle on the same foot pedal. Not sure exactly how it was set up, but that's no good. So I'll use the brake from the mini bike. I'll have to pull the left rear and put the brake on the inside of the wheel. I made sure when I cut the tube for the drive gear to cut a tad extra (about 1/2") so I can put a brake on the outside of the frame there. It'll be a nice little disk brake should slow it down pretty good. Once I get it all setup, I'll have to restrict the throttle. Wide open the mini bike was around 30mph. That's a little too fast I think lol. Would make for some good wipe outs, but the steering is a basic bar swivel style and isn't the best setup for going that fast lol.
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Post by dr4g00n on Jul 26, 2020 15:55:15 GMT -5
Don't think restricting the throttle will work very well when under load for a 2 stroke, may also foul the plug because it can't get enough heat into it to keep it clean if it's not in the powerband at least some of the time.
Shortening the gearing would probably work better since it'll let the engine rev but keep the karts top speed low.
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Post by ShrimpBrime on Jul 26, 2020 16:12:53 GMT -5
Don't think restricting the throttle will work very well when under load for a 2 stroke, may also foul the plug because it can't get enough heat into it to keep it clean if it's not in the powerband at least some of the time. Shortening the gearing would probably work better since it'll let the engine rev but keep the karts top speed low. I had thought the same thing, but a fouled plug is going to be an easier fix I recon. The clutch is proprietary to the engine, so I really don't want to modify it honestly. But totally understand what you're saying. This thing is temporary. By the time he's 10, he'll be to big for it. Then I may look into a 2 seat'er or something so Dad can have some fun too... lol
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Post by Vinster on Jul 26, 2020 16:23:27 GMT -5
The Pine-Sol won't affect the rubber?
Vin
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Post by Bones on Jul 26, 2020 20:35:23 GMT -5
According to the thread I linked it doesn't. It does say to be sure and WD40 stuff (Lube) things if required which I'll do anyway. Most of the rubber stuff on the carb is just hose, easily replaced and probrably needs to be with it's age.
Will start the real work on it tomorrow, disassemble to check the jets and go from there. If I have to get a kit for it, no prob to do.
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Post by Bones on Jul 27, 2020 13:58:45 GMT -5
And here it is after soaking in Pinesol for two days. CLEAN.
Will disassemble it later to inspect, check over and whatever else it needs.
EDIT: I saw that once the carb was exposed to air it started to develop a "White" film or spots, that means once it's exposed to air the Pinesol will attack the aluminum to an extent.
Nothing to worry about but coudn't just leave it like that.
Mind you the mix I used was stronger than what was suggested (3:1) but it worked, so far I have no remaining concretion in the jets from the ethanol that I've seen.
I'm now letting it sit in some hot water to take care of that, get the Pinesol fully dissolved and it should be ready for checking the floats and such. As for what I saw internally, it was clean as a whistle.
The next time I do this I'll be sure to use the correct mix/ratio and once out of the mix from soaking, rinse, flush it out and immediately dunk it in straight water so this doesn't happen again.
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Post by dr4g00n on Jul 28, 2020 15:44:27 GMT -5
Put a new chain and sprocket set on my bike, D.I.D. 520 VX2 X-ring + JT Sprockets. I never realized how bad the old chain was until I went for a ride on the new set, way smoother and no more jerky shifts. Has much more chain whine and vibration in the left peg because of the un-cushioned front sprocket but I don't mind that any. Fudged the rivet link though, pressed the plates too close together so the seal gets squished out, oh well have a couple new ones on the way to give it another shot. Not like I can't ride it in the meantime.
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Post by ShrimpBrime on Aug 14, 2020 21:03:55 GMT -5
OK, I promised a picture, and I'm never on time for anything... So here you go. The mini bike motor mounted. Testing stages for actually driving, even motor adjuster for chain tension is completed. The welds are crappy..... I left the damn Argon tank open over night, and of course all gone. Well any how, so far so good. Next, carb cleaning, brakes, Roll Cage and off he goes! edit: Oh motor kill switch, move the fuel tank also. I mocked it up with the roll cage bolt there. will move the tank back a little bit and also install a fuel filter. Also, a different muffler. Get it a little quieter.
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Post by dr4g00n on Aug 16, 2020 14:47:57 GMT -5
Looks like my poor little 70cc moped's just about had it, wore through the plating on the intake side, not seized but probably won't last much longer. I'm not sure whether I'll fix it or not, I feel it's served it's purpose of teaching me 2 stroke tuning. Edit: Did a quick and dirty scotchbrite hone to blend in the scoring and take off the mirror finish. Runs fine, but for how long is the question.
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Post by Bones on Aug 16, 2020 18:47:50 GMT -5
It may suprise you in how long it lasts but you already know it's subject to failure at anytime. If the cyliner sleeve can be replaced you could potentially fix it period, do that and re-ring the piston, check the bottom end (May as well redo it too) - Good to go.
Had to pull the carbs off the bike just a few ago due to an oversight on my part. I thought it would be fine but instead I have a fuel leak. No prob to fix but just the fact I already had it running makes it a tad annoying. Took about 15 minutes to get them out and will fix the leak a little later on, then remount the carbs and so on. At least the bike started right up when fuel got to the engine.
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Post by dr4g00n on Aug 16, 2020 21:44:26 GMT -5
New cylinders for this engine are dirt cheap, must be made of beer cans because they're only $20 cad a pop.
Tbh I think I'm done with it really, looking around for a proper 2 stroke now. Shame all the air cooled big bore bikes are so old now, makes them pretty hard to come across. Something like a YZ460/490 or CR450/480 would be sweet.
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Post by Bones on Aug 17, 2020 6:04:14 GMT -5
I can tell you already if a 70cc was getting you around one of the big 2 strokes would probrably be too much, a good 250cc 2 stroke has plenty of power itself. I have stashed back a Kawasaki KX 250 2 stroke that was just wild back in the day. It's from a really old model dirtbike (74) and you know that frame was heavy compared to what's seen today yet the thing would get up and GO anyway. I'd also think those would be far easier to find than the ones you named plus cheaper to get and so on. In fact something like a 175 would probrably do but it's really up to you and what you expect. I do know a YZ490 was just too much even for the bike frame it came on, those things were dangerous as was.
EDIT: Don't forget four wheelers are a good candidate for a powerplant too.
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Post by ShrimpBrime on Sept 26, 2020 20:56:39 GMT -5
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Post by ShrimpBrime on Oct 1, 2020 20:59:21 GMT -5
14K RPM overhead cam super bike engine.
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Post by Mr.Scott on Oct 2, 2020 16:55:13 GMT -5
14K RPM overhead cam super bike engine. Wow. My H2 would do 12K but it was 2 stroke. I launched at 10.5 BTW.
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Post by ShrimpBrime on Oct 2, 2020 18:36:48 GMT -5
Damn!
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Post by Mr.Scott on Oct 2, 2020 19:31:23 GMT -5
These were like my first drag bike. 2 stroke H2 based.
I had the most fun on that bike. Probably won more on that one than both the other big bikes combined.
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Post by ShrimpBrime on Oct 2, 2020 19:36:10 GMT -5
Them 3 cylinders sound so awesome. Under 9's man. That's pretty damn quick!
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Post by ShrimpBrime on Oct 3, 2020 11:18:39 GMT -5
Got me watching Bike drags now.... lol. Awesome.
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Post by Mr.Scott on Oct 3, 2020 14:44:56 GMT -5
I will try to find some old pictures. Think I have a few in my toolbox.
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Post by Bones on Oct 16, 2020 5:40:06 GMT -5
Found these and thought you guys would love them.
Doesn't show the entire race with either one but a real nostalgic look at the cars and how it was back in the day before NASCAR became corporately commercialized. The 69 race video even has some old commercials in it for a real feel about the time.
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Post by zila1 on Oct 16, 2020 16:21:30 GMT -5
I remember these like it was yesterday. Thanks Bones. Really takes me back.
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Post by Mr.Scott on Oct 17, 2020 8:34:27 GMT -5
Look at all the Superbirds. Holy crap.
Wide World of Sports, best sports show ever. The thrill of victory and the agony of defeat.
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Post by Bones on Oct 17, 2020 8:48:56 GMT -5
Look at all the Superbirds. Holy crap. Wide World of Sports, best sports show ever. The thrill of victory and the agony of defeat. Can you just imagine it with HWbot? Lots of agony there and not just in defeat.
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Post by Bones on Oct 20, 2020 19:31:42 GMT -5
The video title does not disappoint for the most part.
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Post by ShrimpBrime on Oct 21, 2020 21:57:17 GMT -5
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Post by osmiumoc on Oct 22, 2020 8:09:16 GMT -5
21:22 for the final pull.
Thiy guy and his car project documented on youtube is really entertaining to watch and follow. I love stuff like this as background noise for when I work on things.
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