maccrew
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Custom painted f-act
Posts: 193
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Post by maccrew on Jul 19, 2011 18:51:00 GMT -5
im thinking you guys are right on that, well onto the issue im going to be fixing, its a 15 tooth shaft, so what is a cheaper kit to rebuild my top end to try and get my compression back?
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theo547
Scoot Enthusiast
Posts: 497
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Post by theo547 on Jul 19, 2011 20:25:41 GMT -5
to be totally honest dude its about 50 bucks more for a whole bbk top end as opposed to a rebuild kit....
This is what i would do: And alot of people on here maybe wont agree with me but....
First things first - CHECK COMPRESSION Ive been to local shops that just throw parts at scooters youve already been there once, dont fall victim again. I read this in a forum once and it is SOOO true - There are mechanics and then there are assemblers. a good scooter mechanic is hard to come by. which is why these sites are so helpful. USE THERE ADVICE CHECK YOUR COMPRESSION. Another easy place to find a tester may be a ma and pa shop... they would prolly test it for you just for the hell of it (how often does someone with a scooter ask a automotive tech for help?!)... Just call first and ask them if they would be willing to do it for you.
Back to what i would do.
1. Install a bbk like the one autotech sells - this requires like 2 socket sizes and a screw driver - do it right and its easy. 2. rip out the restriction in the air box (if you havnt already) 3. tune it - if the local guys dont charge too much pay them to do it.. your going to spend 10 bucks on jets anyways... an extra 40 minus the headache of trying to tune one of these things is worth it IMO. just make sure you explain the problems youve had in the past and that if they cannot properly tune it your not going to pay them.
good luck!
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theo547
Scoot Enthusiast
Posts: 497
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Post by theo547 on Jul 19, 2011 20:27:26 GMT -5
PS leave your CVT springs\coils alone if it wasnt the problem before it didnt go bad in 2 weeks
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maccrew
Scoot Enthusiast
Custom painted f-act
Posts: 193
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Post by maccrew on Jul 20, 2011 4:49:38 GMT -5
ok i know this is probably said before, but what should all be done when you do a bbk? what one do i need? i found on ebay a 50cc rebuild kit for 30 bucks so can i get a bbk for around that or no? i dont have much funds to work wiht here. i counted the teeth on the shaft the variator is on and its 15 teeth.
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Post by MAReames on Jul 20, 2011 5:14:07 GMT -5
15 teeth means 12mm wrist pin. I have a used Auto Tech Kit I am trying to sell for $80 shipped. It has less than 50 miles on it and was never soft sized. Only selling because I am doing a 90cc ATV swap.
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Post by 90GTVert on Jul 20, 2011 7:21:53 GMT -5
You won't find a decent BBK for $30. Is that a whole cylinder kit (cylinder, piston, rings at least) or just a piston kit? Along with a BBK, you should expect to tune the carburetor (new main jet, idle settings) and may need to swap to different roller weights.
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Post by drawkward on Jul 20, 2011 14:34:30 GMT -5
Your top end is fine with 110 psi. Your issue is fuel related. IF you MUST spend money, by a set of jets, carb rebuild kit, inline fuel filter and parts needed for manual petcock swap. Honestly, I think it's either a leaky head gasket/spark plug gasket, clogged fuel system (filters, hoses, jets), or even just the iffy oil injection system. Check those before you spend the money on the big bore kit only to have the problem persist or get worse.
Side note. I remember reading that you had oil coming out of the starter access hole in the case behind the flywheel? That much oil in there can't be good for your stator...
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Post by drawkward on Jul 20, 2011 14:38:44 GMT -5
Also, if it does turn out to be the head gasket: Autotech355@gmail.com is Carlos' (the man behind the Autotech355 eBay account) sells them for a buck a piece if you email him directly. Tell him you were referred by the site 49ccscoot.com and vanhook.josh@gmail.com. I keep up a regular dialogue with him, and have linked to this site multiple times. He knows, as I've told him plenty of times, that this site recommends him 100% of the time. He should be able to help you out.
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maccrew
Scoot Enthusiast
Custom painted f-act
Posts: 193
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Post by maccrew on Jul 20, 2011 15:30:53 GMT -5
well last night i went and put a little bit of oil into my gastank to make sure that the motor is getting lubrication, i looked around online and i talked to a couple of my family members who are asc certified mechanics, they said just adding a little bit of oil into the gas wont hurt anything. i did a half ounce because i had 1 gallong of gas, thats what they told me to do, it was smoking really bad and i did retune the carb to make sure, althought it did run a little smoother after adding oil intot he gas (meaning it started alot better and easier), well im just waiting to get access to a paypal so i can order that oil pump, if im gonna skip the bbk kit should i do a head gasket at least to be safe? and what about he spark plug gasket?? what do i need to do a rebuild on my carb? ive never done a manual petcock so what would that all intale? sorry im kinda retarted when it comes to this stuff lol, i can get the fuel filter for 3 bucks.
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maccrew
Scoot Enthusiast
Custom painted f-act
Posts: 193
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Post by maccrew on Jul 20, 2011 16:01:29 GMT -5
ok, drawkward, i took some of your advice so far, i will be updating most of the day as i do and try things, i wentoutside and fired it up, after adding oil directly to the tank, the thing starts right away and does not want to shut off right away. so i tryed covering the air inlet on the air filter and as soon as my hand gets close it just stalls out comepletely, i didnt drive it because i cant cover that when driving so i had it up on middle stand and went almost wot to test it. i took a little video of the smoke from my exhaust and i show you my carb/top o fmy motor, im not good with video so bare withme. s5.photobucket.com/albums/y165/maccrew/?action=view¤t=VID00001-20110720-1551.mp4
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Post by 2strokd on Jul 20, 2011 16:04:59 GMT -5
Ide take the head gasket out and seal it with some type of sealant. RTV black, orange, grey, ive used em all and sealed the head without the gasket. Increases the compression a tad and that cant hurt a stock engine IMO.
Too much oil can cause a problem. If you have to much of an oil mix it will lean out the fuel mix at the main jet. A half once or so per fill-up wont hurt tho. And if it runs that much better you may be a bit rich on your main jet size as well? What was that size, the main?
I have an oil pump for sale as well. PM if interested. I might have a Mikuni with a metal gear still? I have to look.
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maccrew
Scoot Enthusiast
Custom painted f-act
Posts: 193
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Post by maccrew on Jul 20, 2011 16:06:32 GMT -5
i dont know the size of my main jet, never have, its stock as far as i know LOL. if i decide to jsut got premix, do i have t take the oil pump out of the motor, or just remove the oil tank and plug the lines?
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maccrew
Scoot Enthusiast
Custom painted f-act
Posts: 193
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Post by maccrew on Jul 20, 2011 16:15:55 GMT -5
also, i dont have a torque wrench, how hard is it to just take the head off, do the gasket and put it back together?
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Post by drawkward on Jul 20, 2011 16:19:14 GMT -5
Rip off that piece of rubber. You don't need it. It's meant to cover the nut at the top of the metal bend. That nut is for adjusting your throttle cable so it doesn't have slack.
Try this. Don't try to cover the hole completely. Try this: take a piece of tape and cover a very small portion of the air inlet, and then rev it on the stand. Take the tape off, and cover the hole a bit more, and rev it on the stand. Repeat.
Headed home in about 45 minutes. I'll check back in. Check the OMFG thread to see some other suggestions.
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maccrew
Scoot Enthusiast
Custom painted f-act
Posts: 193
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Post by maccrew on Jul 20, 2011 16:33:34 GMT -5
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