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Need a new gy6
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Author:  GX 125 guy [ Tue Oct 14, 2008 10:37 pm ]
Post subject:  Need a new gy6
Hey guys, i need a new gy6 engine, i have a carter bro gx 125, i beleive it has a 150cc engine from the factory though, i would like to get the same exact engine and just swap them out, i dont mind swaping out my f/r gears either, but if i have to buy an engine with the gears then i will. Can anyone point me in the right directions?
Author:  jtramseyjr [ Wed Oct 15, 2008 8:27 am ]
Post subject: 
Here is one and they carry others also.If the link does not work just type in gy6 engine in Ebay search.

http://cgi.ebay.com/ebaymotors/150CC-GY ... 0316103819
Author:  steelbilly [ Wed Oct 15, 2008 10:11 am ]
Post subject: 
check buggydepot, they did have some at a reasonable price while back.
Author:  PGH [ Wed Oct 15, 2008 12:27 pm ]
Post subject: 
steelbilly wrote:
check buggydepot, they did have some at a reasonable price while back.

Here are the links:

Short case 125cc GY6 - http://www.buggydepot.com/store/index.php?main_page=product_info&products_id=151

Howhit 150cc GY6 - http://www.buggydepot.com/store/index.php?main_page=product_info&products_id=149

Short case 150cc GY6 w/ internal reverse - http://www.buggydepot.com/store/index.php?main_page=product_info&products_id=285

Do you really need a new engine or could you just rebuild your current one?
Author:  WETSU [ Wed Oct 15, 2008 4:45 pm ]
Post subject: 
I have the same question,and went to BD to look at their engines and didn't see one with add on reverse like I have on my HH150. I have to have mine rebuilt,but they only want to do the top end. I guess to do the timing chain he'll have to split the case? I guess what I want to know is would it be cheaper to buy a new engine than have mine rebuilt?

Mike
Author:  Funnyman [ Wed Oct 15, 2008 4:50 pm ]
Post subject: 
MIke, u dont have to split the case to do the timing chain!!!
Author:  PGH [ Wed Oct 15, 2008 5:03 pm ]
Post subject: 
The BD engines run $300-$600. For $400, you can get a Howhit. To convert it to reverse, you would pull your existing output shaft and use it to attach your reverse assembly to the new engine. If you are doing the work yourself, you will save money by rebuilding your engine. If you plan on paying someone, you are better off buying a new engine and using the parts you want off your old one. If your current engine is damaged or you were thinking about the larger valve head, an engine swap starts to sound like a better deal.
Author:  GX 125 guy [ Wed Oct 15, 2008 11:14 pm ]
Post subject: 
Well i've tried everything I know and I still have no clue what the problem is, I think im better off with starting fresh with a new engine. I like the howhit engine, is it pretty much the same engine, hp, tq? im pretty sure I have a long case, but how can I tell? And if I do buy this engine, will changing the f/r gears be hard? I have replaced the cable becouse it broke one day, i saw all the gears in there, is it as simple as taking the whole unit off the shaft its on now, and placing it on the new engine? And one more question... how hard is the engine swap? I have an average ammout of expierence with these engines, I have replaced the cvt belt, re jetted and replaced rollers with sliders. All info helps, im just ready to get this thing running again, its been over a year since it has, and I really want to start fresh with a new engine!!!

This is one of my old topics, but it has a few pics of my kart and a few of my engine, if that helps any

https://www.buggynews.com/topic8537.html


Thanks guys, everyone here is really great!!!!
Author:  PGH [ Wed Oct 15, 2008 11:40 pm ]
Post subject: 
The engine is pretty much the same as yours except it is a 150cc with the large valve head. All the buggies I have seen use the short case GY6 - Only large wheeled scooters use the long case. To move the reverse to a new Howhit follow these steps:

1. Drain the final transmission
2. Remove the exhaust
3. Remove the CVT cover
4. Remove the clutch assembly
5. Remove the reverse assembly
6. Remove the final transmission cover
7. Remove the final output shaft
8. Repeat steps 1-7 on the new engine
9. Install the old shaft in the new engine
10. Reassemble and fill the transmission
Author:  GX 125 guy [ Thu Oct 16, 2008 1:52 pm ]
Post subject: 
Can you tell from the pics at the link if i have a short or long case? Ill practice thoes steps on my old engine before i order a new one. So that howhit on bd would be a good choice?
Do you have any expierence on swaping the engine?
Author:  PGH [ Thu Oct 16, 2008 2:29 pm ]
Post subject: 
1. You have a short case
2. If your reverse unit is fine, go with the $400 Howhit. The one with internal reverse may have spacing issues with your axle sprocket and you will have to shim it one way or the other
3. I have replaced the swing arm in my Yerf which required more work than just swapping the engine
Author:  GX 125 guy [ Thu Oct 16, 2008 4:27 pm ]
Post subject: 
Ok, i think the olny thing that will give me a problem is the f/r change, but well see. Do you know the specs of that engine compared to mine by any chance? If not, do you think ill see any difference between my engine and the howhit?
Author:  PGH [ Thu Oct 16, 2008 6:36 pm ]
Post subject: 
The large valve head in the Howhit will allow the engine to breathe better but I do not have any accurate specifications.
Author:  WETSU [ Fri Oct 17, 2008 10:43 pm ]
Post subject: 
pghruby wrote:
The BD engines run $300-$600. For $400, you can get a Howhit. To convert it to reverse, you would pull your existing output shaft and use it to attach your reverse assembly to the new engine. If you are doing the work yourself, you will save money by rebuilding your engine. If you plan on paying someone, you are better off buying a new engine and using the parts you want off your old one. If your current engine is damaged or you were thinking about the larger valve head, an engine swap starts to sound like a better deal.


The worst thing is I have about 30 psi of compression,and I believe it has jumped time. It acts like it is fighting itself to start,and then it just pops. It will spin fast,pop,spin fast slow down,pop,etc. It was smoking alittle,and I think it got hot.
Any way I have the engine out,and dropped off at a local buggy shop,He will have his mechanic go through,find a bigger piston and sleeve,redo the timing,blah,blah ,blah. I told him if it going to exceed $300 stop,and I will just get a new engine.
He might actually have a few from what used to be Vision/Razor.

Karl pm me with what you might know about changing the timing chain/slack adjuster/cam,etc.
Author:  Funnyman [ Sat Oct 18, 2008 12:35 am ]
Post subject: 
I pm'd u
Author:  GX 125 guy [ Sat Oct 18, 2008 12:14 pm ]
Post subject: 
Well i did some work this morning on the buggy, i took the f/r gears off and took the engine out. Here are some pics



Image


Image


Image



Do i have to take anything else off the shaft to put on the new engine? The shaft mesaures 4.5 inches.
Author:  PGH [ Sat Oct 18, 2008 12:48 pm ]
Post subject: 
You need the longer output shaft for your new engine. Drain your final transmission oil and open up the CVT cover. Remove the clutch assembly and you will see an access plate to the final transmission. The output shaft will pull out once this plate is removed.
Author:  GX 125 guy [ Sat Oct 18, 2008 1:48 pm ]
Post subject: 
So the new engine from bd has a shorter shaft than the one I have now, or does the new engine not have a shaft?
Author:  PGH [ Sat Oct 18, 2008 1:58 pm ]
Post subject: 
The Howhit engine has a shorter shaft since it does not have reverse in stock form.
Author:  GX 125 guy [ Sat Oct 18, 2008 3:07 pm ]
Post subject: 
Oh, This all makes sense to me now!!!! I hope removing the shaft is'nt to hard, ive taken off the vairator before but i havent messed with the clutch yet.
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