Clinician
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Post by godfeast on Mar 25, 2011 2:04:59 GMT -6
Well, I'm feeling like it has to be a 150cc.
I put on my old uni filter and upgraded the carb with my old main jet (102 on new stock to my 114), as well as, raising the carb needle one notch from the 2nd to 3rd position.
The scoot is now on roughly 60 miles and does about 53mph, up from 45 when first put out on the road completely stock.
It was that 45 mph sustained top end ceiling that had me worried, but now as little tweaks have put it past 50mph, Im not so concerned, all though I suppose theres still a chance.
Im checking valve clearance tomorrow. If I had a spare gasket, I'd just pull the head and look while I was in there; may grab one later this month and do it anyways.
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Clinician
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Post by godfeast on Mar 24, 2011 14:33:17 GMT -6
The whole problem originates from the manufacturer mismarking the case on purpose.
The only solid thing I have to go on is the fact that the case is identical to a 150cc long and fits in the same scooter as one - which would have me believe that I have a 150cc, except I've been told that a 125cc is also made in this type of case.
I need to be able to tell by physical examination of a part to tell what type I have. I just dont know what to look for or if I find out I have a 125cc, what I need to do to make it a 150cc properly.
I appreciate the link, but standard, this is your engine if its stamped this way, just doesnt help if its mis-stamped by the people who made it.
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Clinician
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Post by godfeast on Mar 24, 2011 12:04:39 GMT -6
I have one final question I cant seem to get anyone to answer for me.
I bought an ebay 150cc engine from tmotorsports, which came marked as a 50cc on the engine casing, but the form factor is a long 150cc case with top mounting bolts.
I am told that in a worse case scenario it cannot be less than a 125 (and in that case the coding is way off and seller admits it, but thats another story).
The engine is in and runs in my sunl adventure 150cc scooter.
I put it in yesterday and on first run around the neighborhood, it sounds kinda loud (maybe incorrect exhaust gasket or loose valves - maybe combo of two) but it also only gets up to about 40 then crawls up to 45 and wont go any faster.
My old 150cc right after a top end rebuild would get up to 60-62mph no problem right off the bat, so I'm concerned.
I havent had a chance to really go over it , but it might be crazy light rollers as well, or maybe a jetting issue - no idea atm.
My main concern and question is: If I did get stuck with a 125cc engine, how much work is going to be needed to make it 150cc?
Is it just a top end job replacing the sleeve, piston, and rings? Does the head need changed? Valves? Crank? Carb?
How can I tell for sure if its a 125cc if the engine castings are marked incorrectly? Can I only tell be removing the head and checking piston size?
Any help or ideas would be appreciated.
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Clinician
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Post by godfeast on Mar 24, 2011 11:58:04 GMT -6
It may not be a big issue for me anyways. I replaced all the taillights (flashers and brake ) with LED's ages ago and the clock is disabled on the dash.
I'm pretty sure my draw is low , although I havent done the math - was planning on adding a 45w walmart fog light to the side of the scoot to increase night visibility, but thats been on the back burner for ages.
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Clinician
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Post by godfeast on Mar 23, 2011 18:40:48 GMT -6
I switched stators today just to be sure, and both stators had the extra wrapped wire going around the coils to power the ac - only difference that I didnt notice before hand for some reason is that the new stator had 8 coils and my old one was 6 - now I may go back in and redo it just for the better stator.
Scooter runs after procedure, so thank you all for the help.
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Clinician
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Post by godfeast on Mar 23, 2011 8:39:49 GMT -6
If I cant get help from someone experienced in a few hours, then yeah, the stator switch and use of old parts os whats going to happen, but Id really like to know what I would need to do to switch over and use new parts.
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Clinician
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Post by godfeast on Mar 22, 2011 22:49:48 GMT -6
I have a stock sunl adventure 2006 150cc which has a bad engine.
I bought a new 150cc engine off of ebay from tmotorsports and installed it.
I had a few electrical issues and after replacing the wiring harness today, i am ready to finish up the job tomorrow, but I have run into a snag.
The stators from both engines "appear" to be the same 6 coil type with exactly the same wiring coming out to the same type of connector.
My old engine has the larger cdi, but has 2 wires coming from the top 2 prong connector (which is contradictory to what the video here and advice elsewhere says will be - I should either have 1 wire up top or a smaller cdi). Both wiring harnesses old, and new are from stock sunl adventures of roughly the same year, and both have the two wires connecting to the top of the cdi.
The new cdi supplied is smaller but otherwise identical.
My old rectifier is the small 4 prong silver one, but the new one suplied is much larger, black, and 5 pronged (research shows a 12volt black monitoring wire as the extra prong).
I am at a loss. I dont know what parts to leave in the bike - considering just swapping the old stator in and using old parts, but I'd like to have new parts used since i paid for them and god only knows how close to the end of the line these used ones are.
Does anyone know how to check for certain if your stator, rectifier, or in my weird situation, the cdi is ac or dc?
If Im switching from one type to another (say ac to dc), Is swapping as easy as just using the new engine stator and accompanying parts (small cdi, and larger rectifier) all thats to it since I already seem to have a second line on the top of my cdi wiring?
*when switching the harness, I checked to see where the second cdi top line went and it showed that it connects to 3 of the starter switch wires (white and yellow for sure), and 2 others on another connector. I wrote it down somewhere but misplaced it earlier - will try to find if relevant.
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