Forums
 FAQHelp  LinksLinks    SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Buddy 125 Aftermarket Carburetor Observations

 
Post new topic   Reply to topic    Forums » General Discussion Previous topic :: Next topic  
Author Message
buzzvert
Member


Joined: 28 Jul 2019
Posts: 76
Location: Longmont, CO
Buddy 125 (2), lots of other bikes no longer in the garage

PostPosted: Fri Aug 16, 2019 1:31 am    Post subject: Buddy 125 Aftermarket Carburetor Observations Reply with quote

Finally got this bad boy in from China:

https://www.ebay.com/itm/CVK26-26mm-Carburetor-Carb-For-Motorcycle-Dirt-Bike-ATV-Scooter-GY6-150-250CC/142942736380?hash=item21480d0ffc:g:IrIAAOSwjexboAMR

And confirmed that it is, more or less, a drop in replacement for the stock CVK carb with a few notable exceptions:

1) Jets. The jets are larger, and it runs massively rich out of the box. Leaning it out and downsizing the jets will match up the airbox. Curiously, out of the box it runs pretty well with the airbox removed or with a "performance" filter.

2) the intake and venturi will JUST fit on the stock manifold. Very tight fit.

3) The throttle cable is workable out of the box.

4) The auto bystarter is plug-compatible.

In short, if you're stuck and can't find a Buddy 125 carb, this SPECIFIC aftermarket CVK carburetor is very workable. After tuning it will behave similar to stock.
Back to top
View user's profile Send private message  
DeeDee
Member


Joined: 26 Jul 2014
Posts: 722
Location: Denver
buddy 170i

PostPosted: Fri Aug 16, 2019 3:43 am    Post subject: Reply with quote

That's a nice write up on an inexpensive alternative to the oem carb. I've come up against this a number of times over the years. It would be helpful to have a $33 option.
Back to top
View user's profile Send private message  
PNWbuddy
Member


Joined: 02 May 2019
Posts: 61
Location: pnw
Buddy125

PostPosted: Fri Aug 16, 2019 4:21 am    Post subject: Reply with quote

I got an identical looking one on Amazon for a few dollars less and one day free shipping with Prime. The one I got was branded Keihin, same as OEM but 26mm instead of 24mm. Jets were Keihin branded. The fuel intake is curved, longer and slightly larger diameter than stock. The pilot was 38 same as the OEM. The main was 118 (OEM is 92) and was way too rich with the stock airbox, as you noted, even for the 161 BBK. With a smaller main jet it ran about the same as the OEM carb.
Back to top
View user's profile Send private message  
buzzvert
Member


Joined: 28 Jul 2019
Posts: 76
Location: Longmont, CO
Buddy 125 (2), lots of other bikes no longer in the garage

PostPosted: Sun Aug 18, 2019 1:45 am    Post subject: Reply with quote

Here's some more details on the $35 special. I need to get better internal venturi measurements but you get the idea.
Back to top
View user's profile Send private message  
buzzvert
Member


Joined: 28 Jul 2019
Posts: 76
Location: Longmont, CO
Buddy 125 (2), lots of other bikes no longer in the garage

PostPosted: Sun Aug 18, 2019 1:55 am    Post subject: Reply with quote

As evidenced by the above, dat ain't the carb I ordered. It's way bigger than it needs to be. But, it CAN be made to work.

Luckily my stock carb is working fine, esp. after a vac diaphragm replacement.
Back to top
View user's profile Send private message  
babblefish
Member


Joined: 04 Dec 2007
Posts: 2957
Location: San Francisco
2006 Blur 180, 2008 Buddy St. Tropez

PostPosted: Sun Aug 18, 2019 2:14 am    Post subject: Reply with quote

A 30mm carb on a stock 125cc engine is WAY overkill. I had one on my highly modified 183cc Blur for a while and while it was pretty good at stop light Gran Prix, for everyday riding it was slightly sluggish on the bottom end and the gas mileage was in the toilet. I eventually put the stock 24mm carb back on (#118 MJ) to get back the gas mileage. I will get a 26mm carb for it one day as a compromise.
_________________
I'm only responsible for what I say, not for what you understand.
Back to top
View user's profile Send private message  
buzzvert
Member


Joined: 28 Jul 2019
Posts: 76
Location: Longmont, CO
Buddy 125 (2), lots of other bikes no longer in the garage

PostPosted: Sun Aug 18, 2019 2:50 am    Post subject: Reply with quote

babblefish wrote:
A 30mm carb on a stock 125cc engine is WAY overkill. I had one on my highly modified 183cc Blur for a while and while it was pretty good at stop light Gran Prix, for everyday riding it was slightly sluggish on the bottom end and the gas mileage was in the toilet. I eventually put the stock 24mm carb back on (#118 MJ) to get back the gas mileage. I will get a 26mm carb for it one day as a compromise.


Yeah. I had to lean it out with jets and completely open up the airbox, and it still wasn't producing what a stock carb could. I just assumed it was the 26mm I ordered... and applied standard protocol.

Goes to show what can be done with the wrong parts. If I ever kit this bike I'll try the 30mm "26" again. Next time I'll bust out the calipers BEFORE I start testing.
Back to top
View user's profile Send private message  
Display posts from previous:   
Post new topic   Reply to topic    Forums » General Discussion Previous topic :: Next topic  Time: GMT

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

  Scootergear designed by riders for riders


Powered by phpBB © 2001, 2005 phpBB Group
All Content Copyright 2007-2011 by Modern Buddy. All Rights Reserved.