2strokd
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Still takin notes...
Posts: 176
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Post by 2strokd on May 20, 2009 14:45:49 GMT -5
This is what my scooter looked like when i bought it well used in Feb 09. It was all stock, and would top out at about 40mph. Almost immediately the mods started. This is a current pic of Skeedr without the new shock i put on yesterday. Needed that shock bad!!! ;D A pic of the tach/hourmeter i added One of the cutout i made for the open k&n style filter Some holes i cut for better CVT cooling The pipe i cut and modified to suit my needs alittle better Something i added to keep dirt and water out of the case. Since i bought it the mods include Polini 70cc Sport kit Removed the oil injection system, pump and all crappy 50cc pipe (soon to go) tuned the cvt with 2000rpm clutch springs 1000 torque spring and a set of 4.5gram Dr.Pulley sliders, and ditched the re stricter washer. Ported stock intake A jetted 18mm Mikuni Carb Carbon fiber reeds in a bigger reed cage with a spacer More to come
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Post by Rebel on May 20, 2009 15:10:42 GMT -5
sounds like you are making a little screamer
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Post by 90GTVert on May 20, 2009 21:42:40 GMT -5
The new shock looks much better. Cool filter cutout too.
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2strokd
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Still takin notes...
Posts: 176
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Post by 2strokd on May 20, 2009 22:52:23 GMT -5
Thanks guys, its wounded though
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2strokd
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Still takin notes...
Posts: 176
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Post by 2strokd on May 20, 2009 22:53:36 GMT -5
Bad night tonight. My uncle and i went on a 35mile round trip ride to a local town i used to live in to see a friend. On the way there i was cruising along about 40 then went to speed up when it just fell out, dropped power bad. I stopped on the side of the road thinking it was hot or not getting fuel (more hot), it was idling high. I went to shut it off with the key and it kept running With the key off! It sounded almost like it was dieseling, or running back wards at about 4grand? Weird, never had that happen. I turned the key back on, then off and it killed the motor finally. I was as puzzled and worried as could be. I checked the fuel line, it was full. I sat there for a few puzzled then kicked it over slow to see if i still had good compression. It felt good so i hit the start button and it fired right up and sounded good. It seemed to run fine, so we finished our trip. Maybe a bad call but it ran great the rest of the way. Trust me, i was paying attention . All was good until i got home, pulled it into the garage, shut it off, then went for a restart and nothing . Good spark, getting fuel, oohhh nnoooo!! The compression feels low . I took the head and cylinder off to find a set of nice Polini piston rings stuck to my piston . Did it get to hot? Not enough oil? To lean? Never got to hot before when i road it WOT for 4,or 5 miles straight. I run Klotz Techniplate oil at 50:1 (more like 45:1), is that a bad idea? Ive had people tell me Klotz is only good for race use.?. Well i race the rat snot out of my scoot sometimes, thats close right? According to my plug readings im not lean at all. What a bummer of a way to end a day !!!! It was running so good to. Any input would help . Be nice though, im hurting already
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Post by Rebel on May 21, 2009 0:50:28 GMT -5
Oh man, sorry to hear about that, I wish I could offer some help, but 2 strokes are not my forte. Get a hold of Brent, he is the best guy I know for those motors.
That being said; I have to think that it was an oil failure with the rings failing, guessing here, did you check out the oil injector and the lines to it? Also I'm not sure about reading the plug on a 2 stroke, is it a grayish color? Since you burn oil with the fuel it just does not compute to me on how to read them.
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Post by 90GTVert on May 21, 2009 5:49:39 GMT -5
That sucks. Is the cylinder and/or piston scarred or are the rings just stuck?
If the rings are just stuck it could be from carbon and you may be able to clean it up. You could try popping the rings out as gently as possible. If they're really stuck you may need to soak the piston/rings in some penetrating oil, like PB Blaster. Once they're out you could use a very find sand paper to go over the top and bottom (not inside and outside) of the rings just enough to be sure there is no buildup there. Use a razor to carefully remove any deposits that may be in the piston's ring lands.
If there is damage you'd need to hone the cylinder and replace the piston and rings. Heat, port sizes, improper oiling, and other things could cause cylinder and/or ring damage.
I don't know anything about Klotz. I have heard it's a good oil, but I've never looked into it any beyond just seeing it mentioned as a good oil. I know that sometimes when people say something is good for race use it doesn't necessarily mean that you need that oil if you rev high a lot etc... When people think of race use they think of high revving, hard accelerating, diving into turns, and all that and forget another important fact about race engines. In many cases race engines are rebuilt regularly so wear isn't always an issue for them like it is for a street motor. I don't know if that has anything to do with this case though.
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2strokd
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Still takin notes...
Posts: 176
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Post by 2strokd on May 21, 2009 15:02:43 GMT -5
I talked to the tech guy at Klotz today, real nice guy. I told him that i had a scooter with a 70 kit and it stuck the rings on me. Right away he started asking the right questions. He asked if i premix, how i run it (WOT) for miles, or stop and go mostly? My app is mostly stop and go but it quit running after a long WOT run. After a short but sweet conversation he told me that the blend i am using is more for alcohol and race apps. Its got a 20% caster blend and he said it will gum up in daily use, and that my long WOT run cooked the gummy caster into solid carbon. I gotta tell ya, after looking at the way my piston and head looked i think he was right. He recommended i run there r50, or there motorcycle techniplate. They are both fully synthetic and better for street use. He said if i raced the scooter at 9 or 10 grad almost all the time this oil would work. Here is a pic My cylinder still looks good Piston not so good. Any good solvent suggestions. I have been soaking it for about 4 hours in some bike chain cleaner.
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Post by Rebel on May 21, 2009 15:21:30 GMT -5
soak it in carb cleaner, and not the one that is basically acetone, if you use that just use acetone.
I do not recall the name of it but there is some carb cleaner that the mechanics used to use on carbs when cars still had carbs that would eat the gum right off, well you had to soak it a while. I stuck my hand in some when I was a kid, thinking it was gasoline, after a few seconds wow I knew it was not and ran to wash it off before it ate my hands off.
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2strokd
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Still takin notes...
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Post by 2strokd on May 21, 2009 22:09:14 GMT -5
I have it soaking in the chain cleaner over night, if that doesn't work i will try that. Thanks for the tip
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2strokd
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Still takin notes...
Posts: 176
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Post by 2strokd on May 21, 2009 22:25:52 GMT -5
Well im back to 49cc,s for now . The rings on my Polini piston are so stuck im not sure they are gonna come off. I need wheels and still had the stock cylinder and piston, so i cleaned them up and put it together without a base, or head gasket. I made a set of intake gaskets for the reed spacer, and the CF reeds. It runs way better than it did when it had the stock 49cc before. I did remove the rings and clean them and the grooves well. The reed spacer, and CF reeds are the only thing different from when this top end was on before. It definitely doesn't run like a 70cc, but good enough for now. It will still run 50mph . As soon as i can afford it am going to get a new pipe thats tuned for a 70cc like i should have done to begin with (big mistake on my part ), maybe a new set of rings, a 10x14x15mm rod end bearing, a new set of gaskets, and a manual choke, ohh and of course some R50 Klotz instead of the techniplate. Im running the old gas out in this motor. It wont be in long so it should be fine.
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Post by Rebel on May 21, 2009 23:01:16 GMT -5
Keep soaking that piston and rings, but do put it in a carb cleaner, you might be surprised how much with come off. Since you have it going with the small bore kit, just let it soak for a couple days if you need to. then clean it with some gas or diesel and see how it looks before you start buying parts.
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2strokd
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Post by 2strokd on May 21, 2009 23:25:24 GMT -5
Sounds like a plan to me Rebel, thanks. I will look for some GOOD carb cleaner. If its good enough to make ya run to the sink to wash it off your hands i gotta try it.
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xs650
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Posts: 133
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Post by xs650 on May 21, 2009 23:45:56 GMT -5
Sounds like a plan to me Rebel, thanks. I will look for some GOOD carb cleaner. If its good enough to make ya run to the sink to wash it off your hands i gotta try it. Berryman B9 Chem-Dip parts cleaner looks like the stuff I used to use. It's the nasty stuff that will take you skin off and it works. A lot of people call it carburetor cleaner because it was used for that so often. www.berrymanproducts.com/Default.aspx?tabid=125You can also try oven cleaner, it works pretty good on baked on carbon. Use the nastiest sounding one you can find. If it says "safe" you don't want it.
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2strokd
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Still takin notes...
Posts: 176
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Post by 2strokd on May 21, 2009 23:50:10 GMT -5
Sounds like a plan to me Rebel, thanks. I will look for some GOOD carb cleaner. If its good enough to make ya run to the sink to wash it off your hands i gotta try it. Berryman B9 Chem-Dip parts cleaner looks like the stuff I used to use. It's the nasty stuff that will take you skin off and it works. A lot of people call it carburetor cleaner because it was used for that so often. www.berrymanproducts.com/Default.aspx?tabid=125You can also try oven cleaner, it works pretty good on baked on carbon. Use the nastiest sounding one you can find. If it says "safe" you don't want it. Ok i remember seeing that stuff somewhere, i think a saw it at a local parts store. Thanks, i will give it a shot
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