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Post by janice on Aug 7, 2007 17:34:26 GMT -5
I hope that you are able to get the jet unplugged tonight. Donny and I are about to start putting the Elite back together but he has to clean the carb first and i am hoping that he doesn't run into the same problem as nothing has been done on this scooter maintenance wise for years which seems to be the same problem you have been having. I am looking forward to seeing the Beluga running almost as much as I am the Elite.
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Post by chanito on Aug 7, 2007 20:10:16 GMT -5
 Actually i want DD to keep the beluga and advice little dd to get a new Ruckus
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Post by Dandy Dan on Aug 8, 2007 9:22:05 GMT -5
Last night I.... - Unclogged the slow jet  - Replaced all the air hoses with new ones - Replaced the Gear Oil - Fully Drained the Gas and refilled with fresh regular gas - Bled the Oil Pump - Oiled and Installed a new Airfilter As a result of unclogging the slow jet, now my scooter idles and it runs a little better topping out at 45km/hr (27mph) instead of 35km/hr (20mph) but it's still not performing like it should. It should top out around 70-75km/hr (45mph). I believe my ignition coil wire to the spark plug is damaged so that might be part of it and also I have a major dent in my exhaust header which could be part of the problem. Other than those 2 things, I'm pretty low on ideas. I know the compression is good because I tested it at 120psi last night and I think the air/fuel mix is good because the airfitler is new and the carb seems to be perfect after I rebuilt it. |
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Post by chanito on Aug 8, 2007 20:25:49 GMT -5
 Have you done anything to the drive train (variator and clutch) they might need some TLC
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Post by Dandy Dan on Aug 9, 2007 9:57:02 GMT -5
I'm planning on poking around in there and probably doing new weights and a drive belt but I don't want to get into that until I get the engine making a somewhat normal amount of power. Right now the engine is completely gutless because it's not running right so it's not just a drivetrain issue. It's an 80cc 2-stroke and right now I'd say it's making 1/2 the power of a stock Ruckus. Somethings wrong with the engine and I think it's either a spark or air/fuel mix issue.
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Post by Dandy Dan on Aug 9, 2007 13:23:01 GMT -5
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Post by Dandy Dan on Aug 11, 2007 23:25:01 GMT -5
Is it possible to have a bum reed cage yet get good compression test readings? Or will a faulty reed cage kill your readings?
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Post by Dandy Dan on Aug 15, 2007 12:26:05 GMT -5
Update:
I did another compression test with a warm engine and only got a reading of 90psi. I've done some research and it seems like ideally you want a compression reading of 17-20 times your compression ratio (which is either 6.8 or 7.0 I forget). That means ideally I want to get a reading of 115-140psi. Furthermore, I read that you should get to about 2/3 of your final compression test reading after just one kick whereas I was getting to about 20-30psi in one kick.
As a result, I have concluded that my engine does not have good compression. Yesterday I ordered a 0.25mm oversize piston and rings which are backordered for a couple weeks so when those arrive I am going to get my engine overbored and honed. Thankfully this job is way easier with a removable sleeve engine than it is for the Ruckus engine. I don't need to split the case but rather I just undo 4 bolts and head, cylinder and piston slip right off basically.
So that's what I've been up to...in the mean time before the new parts get here I'm going to be fixing a bunch of electrical issues, installing new tires, brake shoes, mirrors and fixing up a bunch of miscellaneous stuff so when I get my overbored cylinder back it'll be mere hours before I'm tearing around.
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Post by chanito on Aug 15, 2007 19:49:47 GMT -5
Yeah they being 2 cyclew do not have much time to built compression, more than likelly need rings. Welcome to the 2 cycle world
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Post by Kami no Chiizu on Aug 15, 2007 23:03:23 GMT -5
After you get done with that, you can come down here and I'll put you to work on Tomos.
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Post by Dandy Dan on Aug 16, 2007 9:10:37 GMT -5
Yeah they being 2 cyclew do not have much time to built compression, more than likelly need rings. Welcome to the 2 cycle world Do you think that just doing new rings with the stock piston and stock cylinder would be a big improvement in compression? Or is going to a 0.25mm oversize bore a better idea? Doing the oversized piston is an extra $60 for the piston and $60 for the boring work so I'd hate to spend an extra $120 if I could have fixed the issue with just new rings. |
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Post by chanito on Aug 16, 2007 13:42:08 GMT -5
 Yeah! new rings (usually only 2) should take care of that problem
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Post by Dandy Dan on Aug 16, 2007 15:17:11 GMT -5
Hmm....okay so new rings should be basically as good as spending way more money for a new oversized piston and overbored cylinder....
I guess I'll change my order....do I need to get my cylinder honed still? Or can I just toss the new rings in and be done with it?
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Post by Dandy Dan on Aug 21, 2007 13:52:38 GMT -5
I did a ton of work to the Beluga last night including new tires and getting the horn working and I disassembled a lot of the engine. The piston and cylinder actually looks really good. There is no scuffing on the walls and the piston only shows minor evidence of blow-by. I'm wondering if perhaps my lack of compression is caused by a damaged reed cage so I'm going to check that next (probably thursday). Unfortunately the engine mounting bracket is right on top of the bolts holding the reed cage on so I need to remove the engine completely before I can remove the reed cage and check this which is why I ran out of time to do it last night.
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Post by Dandy Dan on Aug 23, 2007 14:51:16 GMT -5
Update:
Tuesday I pulled my reed cage and discovered that one of the 3 reed petals was apparently bent because it was staying open about 1/16". After finding out my Yamaha dealer can not get these parts I set about diassembling the reed cage and discovered that a piece of grass had gotten lodged between the reed and the cage which was what was holding it open. I've got that cleared out now and the reed cage is back together so tonight once I finish detailing my engine I'm going to see how it runs.
I'm still doing the oversized piston too though because my compression was low and it does have 15,000 kms on it so that should also add some more power. I opted for the oversized piston over just new rings partly because I had already ordered the oversized stuff and they charge a fee if you cancel and also because I'm just anal and worried that if my cylinder is worn a lot, then the new rings still won't give me great compression.
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Post by timberwolfmadcat on Aug 23, 2007 19:23:31 GMT -5
Update: Tuesday I pulled my reed cage and discovered that one of the 3 reed petals was apparently bent because it was staying open about 1/16". After finding out my Yamaha dealer can not get these parts I set about diassembling the reed cage and discovered that a piece of grass had gotten lodged between the reed and the cage which was what was holding it open. I've got that cleared out now and the reed cage is back together so tonight once I finish detailing my engine I'm going to see how it runs. I'm still doing the oversized piston too though because my compression was low and it does have 15,000 kms on it so that should also add some more power. I opted for the oversized piston over just new rings partly because I had already ordered the oversized stuff and they charge a fee if you cancel and also because I'm just anal and worried that if my cylinder is worn a lot, then the new rings still won't give me great compression. And your gonna be spending 3 someodd hours rebuilding the thing might as well get some benefit outta it ;D |
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Post by Dandy Dan on Aug 24, 2007 9:31:52 GMT -5
Yup....I spent another 3-4 hours last night working on it. I got the engine sparkling now....I bet I spent 5 hours total cleaning the crap off that thing. The reed cage seems to be solid now that I got that blade of grass out of there. I ditched all the lame phillips screws that Yamaha used with this engine and replaced them with some nice bolts and then I tossed the engine back in the scooter (which was a MAJOR pain!) and did a bunch of lame 2-stroke stuff like bleeding the oil pump.
The scooter is basically back to running form except the cylinder and head aren't attached which should be as simple as sliding them on the studs and tightening the 4 nuts except the gaskets fell apart and I don't want to use my new gaskets until I'm putting the cylinder on for good.
Hopefully the oversized piston/rings arrives soon so I can get the ball rolling on that. I also won an exhaust on eBay yesterday which will be nice because my stock exhaust had that huge dent in the header. Pics soon....I promise!
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Post by timberwolfmadcat on Aug 24, 2007 9:42:29 GMT -5
Yup....I spent another 3-4 hours last night working on it. I got the engine sparkling now....I bet I spent 5 hours total cleaning the crap off that thing. The reed cage seems to be solid now that I got that blade of grass out of there. I ditched all the lame phillips screws that Yamaha used with this engine and replaced them with some nice bolts and then I tossed the engine back in the scooter (which was a MAJOR pain!) and did a bunch of lame 2-stroke stuff like bleeding the oil pump. The scooter is basically back to running form except the cylinder and head aren't attached which should be as simple as sliding them on the studs and tightening the 4 nuts except the gaskets fell apart and I don't want to use my new gaskets until I'm putting the cylinder on for good. Hopefully the oversized piston/rings arrives soon so I can get the ball rolling on that. I also won an exhaust on eBay yesterday which will be nice because my stock exhaust had that huge dent in the header. Pics soon....I promise! Its really sad this ugly beast would pwn the Ruckus in a race  |
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Post by Dandy Dan on Aug 24, 2007 11:53:30 GMT -5
Oversized piston has arrived! Hopefully they won't take too long to bore/hone my cylinder because I'd like to have this back together and running before I head off to Cuba next Saturday for a week.
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Post by Dandy Dan on Aug 24, 2007 11:57:33 GMT -5
]Its really sad this ugly beast would pwn the Ruckus in a race Ugly beast? No way!....................................okay yes now that I think about it more it is pretty nasty looking. I still think my Beluga is like a fine exotic food though (ie. Olives or Mushrooms), sure they're gross at first but they grow on you and after a while become one of your favouites. Spend a mere 30 seconds staring at this pic below while you imagine how it would look in your favourite colour and with a few mods and it'll grow on you:  |
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