Honest opionion and insight needed By paulo (Read 495 times)

[paulo]

Good morning guys.

I have read lots of posts about BBK and what is best, and what must one do etc...( I have done some homework ) , but have now decided to actually go through with the GY6 (152 qmi) 125cc, engine build up, but lack the hands on experience that you guys have. I am technically minded and capable and have some tools to work.....I just need an honest opion of what will work best from the people who know what they are talking about.


I would like to get some extra speed (goes no faster than 50mph/53mph) on top end as well as some power. I dont expect it to hit 90 mph, but a little more unfff would be nice when squeezing throttle. From what i have read, the 180 cc (58.5mm) BBK is a straight fit with no case boring and no need to open case.



The 200 cc (61mm) kit on the other hand needs some case work done from what i understood and read.(if im wrong, please correct me)



Here under are 2 kits i have found and interest me:

180cc :



www.aliexpress.com/item/GY6-125-150cc-upgrade-180cc-add-power-30-Racing-Camshaft-CDI-Muffler-Performance-Exhaust-Oil-pump/32509114489.html?spm=2114.10010108.100010.17.n03WSN&aff_platform=aaf&sk=bm2aeAra%3A&cpt=1460126317168&af=6152586&cn=002&cv=10925486&dp=imrtich01b005bkn008sc&PID=6152586&URL=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FGY6-125-150cc-upgrade-180cc-add-power-30-Racing-Camshaft-CDI-Muffler-Performance-Exhaust-Oil-pump%2F32509114489.html%3Fspm%3D2114.10010108.100010.17.n03WSN&aff_trace_key=5ee6d30192a14f3d928adf617712360c-1460126317168-07482-bm2aeAra



200cc:


www.aliexpress.com/item/GY6-125cc-150cc-upgrade-to-GY6-200cc-add-power-at-least-30-Racing-Camshaft-CDI-Muffler/32510620459.html?aff_platform=aaf&sk=bm2aeAra%3A&cpt=1460126351272&af=6152586&cn=002&cv=10925486&dp=imrtj2df6e005bkn008sc&PID=6152586&URL=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FGY6-125cc-150cc-upgrade-to-GY6-200cc-add-power-at-least-30-Racing-Camshaft-CDI-Muffler%2F32510620459.html&aff_trace_key=5ee6d30192a14f3d928adf617712360c-1460126351272-07808-bm2aeAra



What do you guys think about these kits? Is what this man is selling any good and the setup he has will it work nicely as a kit? Any other modifications i could do with this setup? A recommended cluth/variator combination you guys actually know work well? Or maybe another setup (not breaking the bank though :-) that would give me what im looking for?



I would like to thankyou all in advance. any help/opinions would be appreciated.



A big HELLO from Belgium

Paulo

[czmdiver]

Welcome Paulo
Those pages came up "not found" to me right now so I couldn't see the specific product.
Im not familiar with how hard or were you can best obtain product shipped to Belgium.
Since your just getting started but ya got a brain the simpler the better for a success full assembly.
Choosing the correct Combination of hot rod parts is the key.
I will suggest sticking with a Non Case Bore Bolt on BB Cylinder.
to reap the benefits of the Larger displacement I would recommend a matching bore size larger valve cylinder head.
And to reap the hot rod head benefits Choose a Cam that matches closer to at what rpm you want to make the most power.
Your Stock carb will be fine. keep it simple.
Here are some Cam choices.

Shell be making mo snots so you can go ahead and drop the gear, will gain some top mph while dropping rpm at that speed.
Take you time, ask allot of questions, post up some pics
Good Luck

[czmdiver]

shop.martinmopeds.com/Big-Bore-Kits_c50.htm
I just jumped over and looked at this product.
the first two kits include the supposed high perf head.
dmn those are cheap prices.  $74.99 us + a cam, jets, oil, dirty hands and your down the road.

[paulo]

Thanks for reply guys......I have revised the links....im more inclined to the 180 cc kit....All i need to know is this ok for what i am looking for.....

180cc

www.aliexpress.com/item/GY6-125-150cc-upgrade-180cc-add-power-30-Racing-Camshaft-CDI-Muffler-Performance-Exhaust-Oil-pump/32509114489.html?spm=2114.10010108.100010.17.n03WSN&aff_platform=aaf&sk=bm2aeAra%3A&cpt=1460126317168&af=6152586&cn=002&cv=10925486&dp=imrtich01b005bkn008sc&PID=6152586&URL=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FGY6-125-150cc-upgrade-180cc-add-power-30-Racing-Camshaft-CDI-Muffler-Performance-Exhaust-Oil-pump%2F32509114489.html%3Fspm%3D2114.10010108.100010.17.n03WSN&aff_trace_key=5ee6d30192a14f3d928adf617712360c-1460126317168-07482-bm2aeAra


____________________________________________
200 cc

www.aliexpress.com/item/GY6-125cc-150cc-upgrade-to-GY6-200cc-add-power-at-least-30-Racing-Camshaft-CDI-Muffler/32510620459.html?aff_platform=aaf&sk=bm2aeAra%3A&cpt=1460126351272&af=6152586&cn=002&cv=10925486&dp=imrtj2df6e005bkn008sc&PID=6152586&URL=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FGY6-125cc-150cc-upgrade-to-GY6-200cc-add-power-at-least-30-Racing-Camshaft-CDI-Muffler%2F32510620459.html&aff_trace_key=5ee6d30192a14f3d928adf617712360c-1460126351272-07808-bm2aeAra

[czmdiver]

Oh wow, all that for$199 us.
Not a bad combination. Tuned correctly will get you all you want and probably more, reliably.
I am familiar with that Pipe. it is a tru straight thru perf pipe. it came with a little optional baffle if you to run it. These Pipes are pretty Load.

[paulo]

It really is a good price (Although i must still pay import taxes and VAT) for everything that comes with this kit. I do recognise some parts from searchin around that are frequently used in the upgrades. As i said earlier, i really just want to get some more unffffff out of bike when needed. I dont intend to ride full throttle all the time. I dont think i can go wrong with the BB 180cc kit. From what i have read (and re-read) it is a straight bolt off/on combination...Then setting everything correctly will be the harder part. But i know that i will get it right. 

Just another question. the cam that come with this 180cc kit. Will it be fine for this setup? and also what cluth/springs and variotor kit could i use to even get more power out of bike? 

Once again thanks for taking the time to answer and clear some doughts czmdiver .

Paulo 

[czmdiver]

I'm not perfectly clear on the Vendors description and choices.
One kit includes a A-14 Cam and the other a A-9 ?
The A-9 is the most popular. compared to the other choices its considered a top end cam. many choose based on the top number just to throw down the highest hp. there choice. its the down low and midrange rpm were most of ride the things all the time so I like Mine best there.
That A-14 May work better with a stock bore combo or something.
I kinda like the numbers on the A-11 myself.

[Alleyoop]

Have to really watch what your buying your stock 150 GY6 is 149.6cc's. The one that they say is 180cc is a 58.5mm bore which gives you 155.36cc's. The one that they say is a 200cc is a 61mm bore which gives you 168.92cc's and requires boring your case.

These dealers love to round up the numbers and they all do it. NOT a one I have found tell you the real Displacement of their kits. The displacement would go up some if a stroker where added but all they add is a cam which either gives you low end grunt or high end R's.

My motor was a 149.6cc 157QMJ, had it bored out and had a 62mm BBK with a 60mm Stroker put in, it is now a true 182cc motor.
Alleyoop

[jct842]

If it was me I would opt for the A8 according to the chart. I kind of like a motor to last. A gy6 may well hit those insane rpms but they are not going to last at 10,000 rpm.

[paulo]

Apr 8, 2016 12:04:32 GMT -6 Alleyoop said:

Have to really watch what your buying your stock 150 GY6 is 149.6cc's. The one that they say is 180cc is a 58.5mm bore which gives you 155.36cc's. The one that they say is a 200cc is a 61mm bore which gives you 168.92cc's and requires boring your case.

These dealers love to round up the numbers and they all do it. NOT a one I have found tell you the real Displacement of their kits. The displacement would go up some if a stroker where added but all they add is a cam which either gives you low end grunt or high end R's.

My motor was a 149.6cc 157QMJ, had it bored out and had a 62mm BBK with a 60mm Stroker put in, it is now a true 182cc motor.
Alleyoop

____________________________________________________________________

Alleyoop..... You absolutely right. I did some further research on what you said...You are absolutely right about cc's. My bike is a 125 cc so i would still feel some gain in power/speed with the 58.5 mm kit advertised. Or will in not do much and should i rather look for a true 180cc conversion with case bored. If so what cam is best? And what else should i change?

[Alleyoop]

AH, Sorry BRO, I overlooked that you have a 125cc so the 58.5 will DO YOU GOOD that is 30 more ccs than what you have that is a lot and it will be reliable as well. So in your case I would go with the 58.5 up grade and bring your 125cc to 155ccs. Cam I like the A11 cam which gives good low end and good top end.
Alleyoop

[czmdiver]

Apr 9, 2016 11:02:19 GMT -6 Alleyoop said:

AH, Sorry BRO, I overlooked that you have a 125cc so the 58.5 will DO YOU GOOD that is 30 more ccs than what you have that is a lot and it will be reliable as well. So in your case I would go with the 58.5 up grade and bring your 125cc to 155ccs. Cam I like the A11 cam which gives good low end and good top end.
Alleyoop

Ya, Ya, what he said/we said. 
The A-11 has a little wider power band. but its a personal thing in the end of were You want your best.
All you want and more.