Register FAQ Community Calendar Today's Posts Search
Go Back   ScootDawg Forums > Performance :: Maintenance :: Technical > 50cc - 124cc
Reply
 
Thread Tools Search this Thread Display Modes
Old 05-24-2013, 01:03 PM   #1
lykos23   lykos23 is offline
 
lykos23's Avatar
 
Join Date: Jan 2013
Location: McHenry, IL
Posts: 151
Send a message via MSN to lykos23 Send a message via Skype™ to lykos23
Which BBK Is Right For Me?

I've come a long way in attaining high speeds on my stock 63cc scooter, but it's about time for doing that popular thing that's equivalent to compiling your own linux kernel in the world of scoots; a BBK install.

I've been watching lots of youtube videos on the procedure, I've been reading up on the results, and I'm perturbed by the contrasting opinions. Some people say that too much of a bbk will ruin internal parts and etc. Others say that anything less than 72cc isn't worth installing. And while I know there is no true 100cc kit, what cc exactly is the 50mm bore kit?

I need my bike to last, but I also need my bike to go 45mph+ just to reach my bank. Right now 40mph is my top speed at 63cc and I've done all I can in regards to variator weights, clutch springs, performance coil, carb jetting, and all the main necessities so I think it's time to up the engine power.

I've got a Peace Sports 50, 2009 model.


I plan on getting this exhaust http://www.amazon.com/gp/product/B00...d=ABXFT02JRY7L for when I install the bbk, because I've read horror stories that a performance exhaust will ruin a stock engine unless it has enough power to push all the air out of the exhaust.

So which bbk is the right one for me?

Right now the following are in my cart and I'm not sure if any of them are good or which one I should really get:

http://www.amazon.com/Scooter-Bore-7...m+big+bore+kit

http://www.ebay.com/itm/GY6-Scooter-...236435&vxp=mtr

http://www.amazon.com/gp/product/B00...A1NHCW6NW9A2EP

http://www.ebay.com/itm/100cc-Big-Bore-Kit-Cylinder-Head-Piston-Rings-Scooter-139QMB-GY6-Engine-70002-/290910381530?pt=Motorcycles_Parts_Accessories&hash =item43bb9c25da&vxp=mtr

http://www.ebay.com/itm/Gy6-engine-8...1f9673&vxp=mtr



I eventually plan on getting another scooter just because I like toying with these things, would I be able to take my old 63cc piston and bore and install it in a different 49cc 139qmb for a cheap little bbk upgrade?

This thread has helped me in my decision to get a bbk:
http://scootdawg.proboards.com/index...y&thread=21571



Login or Register to Remove Ads

Last edited by lykos23; 05-25-2013 at 07:59 AM.
  Reply With Quote
Old 05-24-2013, 07:44 PM   #2
lykos23   lykos23 is offline
 
lykos23's Avatar
 
Join Date: Jan 2013
Location: McHenry, IL
Posts: 151
Send a message via MSN to lykos23 Send a message via Skype™ to lykos23
I think I found the perfect kit!

http://www.amazon.com/Scooter-Bore-7...m+big+bore+kit

Mainly because it comes with a performance camshaft. Unless somebody else has some opinions by the time I order it, around the first weekend of next month.

I'm really tempted to get that 50mm bbk, but I read horror stories of people breaking things with so much power, and even though 72cc isn't much of an upgrade from 63cc I think it will give me just enough umph to reach my goal of 45mph. Plus I won't have to change anything with my carburetor other than maybe the main jet, I think.

Unless I find some preventative measure I can take to increase the longevity of my engine with a bigger bbk I think I'm going to get this one... I sure hope the performance exhaust will work with such a meager bbk, haha.
  Reply With Quote
Old 05-24-2013, 08:28 PM   #3
buford1488   buford1488 is offline
 
Join Date: Mar 2011
Posts: 29
you got to talk to millsc on here he can help you alot.....contact scrappydogscooter.com...thanks..buford



Login or Register to Remove Ads
  Reply With Quote
Old 05-24-2013, 08:36 PM   #4
lykos23   lykos23 is offline
 
lykos23's Avatar
 
Join Date: Jan 2013
Location: McHenry, IL
Posts: 151
Send a message via MSN to lykos23 Send a message via Skype™ to lykos23
Quote:
Originally Posted by buford1488 View Post
you got to talk to millsc on here he can help you alot.....contact scrappydogscooter.com...thanks..buford
Yeah, Millsc is pretty great at this stuff. I've tried looking through scrappydogscooter's bbks but they don't have quite as much of a bang for buck as the ones on ebay and amazon have. I mean, one of them comes with a camshaft for the price of just the bore and piston on scrappydogscooters. Their other products and prices are great though.
  Reply With Quote
Old 06-11-2013, 02:49 PM   #5
fieromoped   fieromoped is offline
 
Join Date: May 2013
Posts: 1
I tried almost every bigbore kit on a 50cc moped, I finally broke down and installed a 150cc, I DO NOT REGRET IT I will provide pics on another thread, But its a short case install and the moped looks just like a stock 50cc, Sleeper



Login or Register to Remove Ads
  Reply With Quote
Old 06-11-2013, 04:07 PM   #6
inuyasha   inuyasha is offline
 
inuyasha's Avatar
 
Join Date: Sep 2012
Location: West Haven CT
Posts: 1,165
Quote:
Originally Posted by fieromoped View Post
I tried almost every bigbore kit on a 50cc moped, I finally broke down and installed a 150cc, I DO NOT REGRET IT I will provide pics on another thread, But its a short case install and the moped looks just like a stock 50cc, Sleeper
Hi
Welcome aboard
Pleased to meet you
Have you registered and tagged it as a 150 since you changed it? and do you have your motorcycle endorsement? if not your riding an illegal scoot and are opening your self up for possible legal problems
Take care and ride safely
Yours Hank
__________________
"4wheels move the body 2 wheels move the soul"
Duty, Honor, Country. Those three hallowed words reverently dictate what you ought to be, what you can be, what you will be.
Douglas MacArthur
  Reply With Quote
Old 06-12-2013, 01:00 PM   #7
lykos23   lykos23 is offline
 
lykos23's Avatar
 
Join Date: Jan 2013
Location: McHenry, IL
Posts: 151
Send a message via MSN to lykos23 Send a message via Skype™ to lykos23
Quote:
Originally Posted by fieromoped View Post
I tried almost every bigbore kit on a 50cc moped, I finally broke down and installed a 150cc, I DO NOT REGRET IT I will provide pics on another thread, But its a short case install and the moped looks just like a stock 50cc, Sleeper
Make sure to listen to Hank's advice.

I finally installed my 50mm bbk and it's plenty of power for me Just for the heck of it I'm installing a few more performance upgrades and then I'm good to go. Go 50mph that is.
__________________
Bashan Peace Sports 50 Former "Secret 60" named
"The Great Leap Forward":
Performance CDI, Koso Variator, ignition Coil, UNI Filter, iridium sparkplug, etc.
16/50 Performance Gears
Six 9g Dr. Pulley variator slider weights
2k clutch springs
38 Pilot Jet
95 Main Jet
Pirelli SL-26 Tires
10w40 Castrol 4T
A9 Camshaft
Performance exhaust
81.2889cc, 50mm BBK
  Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:04 PM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.