Big Bang For My Buck

NeoGenesisMax · Post by **NeoGenesisMax** » Wed Jun 26, 2013 11:30 pm

Hey I've been looking for a thrifty way to get more out of my scooter. Prices on parts are all over the place. I've seen exhaust pipes for $91 to $300 and they mostly appear to be of similar build and performance. The same can be said for 70cc kits I've seen $54 all the way up to $318 and often look to be of similar build and design. I know that the devil is in the details but for somebody that's ok with not having top of the line parts because most seem to be geared to high end racing and I don't plan on pushing any of the components to that kind of stress levels. If I can spend half as much and get about the same out come then why not. That all being said. I have questions

Out of those of you who've done the BBK route. What brand did you buy and are you satisfied with it?

NeoGenesisMax · Post by **NeoGenesisMax** » Wed Jun 26, 2013 11:31 pm

And for those of you who've done the BBK, did you get a new carb or just upjet?

NeoGenesisMax · Post by **NeoGenesisMax** » Wed Jun 26, 2013 11:52 pm

What wrist pin do I need a 12mm or 10mm?

BuddyRaton · Post by **BuddyRaton** » Thu Jun 27, 2013 1:41 am

I would suggest that you do a lot more home work before buying anything...especially if you don't know what size wrist pin you have.

The first rule of Modifying

Fast
Cheap
Reliable

Pick two from the list above

Throwback7R · Post by **Throwback7R** » Thu Jun 27, 2013 12:21 pm

i had a 150, And I did the BBK on mine so now it is a 171 Also added the large valve head, intake, carb, exhaust, air filter, cdi, trans upgrade.

the BBK is not for the faint of heart to install if you have not done any work on small engines before.

the biggest bang for my buck was the trans kit.

BTW all the stuff was NCY except for the carb, air filter

Hope this helps.

BuddyRaton · Post by **BuddyRaton** » Thu Jun 27, 2013 12:48 pm

It looks like the OP is running a 50 2T so changing out the top end is easier than a 4T (no valves, chain, cam etc) but I still would not recommend it as a first project. There are some tricks to it and if not done right...well like any mod...you may blow a motor.

The biggest bang for your buck is going to be a small windshield. Uber easy mod and no chance of messing up a motor. Sounds like it shouldn't make much difference...but it does.

lovemysan · Post by **lovemysan** » Thu Jun 27, 2013 1:32 pm

Best bang for buck is going to be a prima or Leo Vince street pipe. No race pipes. Then desnorkel the airbox and drill 4 1/4" holes at the rear of the airbox cover. An Ncy torque Sheave, yellow clutch springs, and 5 gram rollers. This will run you about $300. You'll also need to buy every main jet from 85-110 for a keihin pb. They are $6 each. Most likely you'll be a 95 main jet, I'd recommend 85,90,92,95,98,100,102,105,110. Prima rollers are junk. At 250lbs I could reach 50 mph indicated on level ground.

If your going to big bore the stock carb will cause it to run hot. I know a guy who has seezed a Zuma and super 9 lc both kitted. Ran the stock carb on both. Both lasted 3k miles but I think a top end every 3k is unacceptable. And siezing a motor multilpe tines will kill the crank. The cheapest kit I'd run is the prima or Ncy. I'd strongly recommend a top trophy or malossi iron kit for a daily driver.

So you need the following
70cc kit
19-21 mm carb (malossi carb is a 19mm and bolt in $200)
Large bore intake manifold
Carbon fiber reeds
Open up the airbox or unifilter
Lots of tuning
The transmission recipe will have to be adjusted and eventually upgraded.

lovemysan · Post by **lovemysan** » Thu Jun 27, 2013 1:35 pm

I just noticed your local. If you want some help wrenching let me know and I have a decent jet collection. David at Scooterworld is good guy if you need a shop for anything.

NeoGenesisMax · Post by **NeoGenesisMax** » Thu Jun 27, 2013 9:34 pm

I can't seem to find a better deal anywhere on the internet for something like this.

http://www.scootertronics.com/zuma-cyli ... -bore.html

This seems to be a very good start. I'd want to get a new pipe as well and see how things run for a bit. I fully intend to have the dealer install and tune the scoot. I have better then average mechanical skills (keep in mind the average person has none ha ha) but I don't feel like attempting this on my own.

If this kit works then maybe I'll write a short review of my experience.

lovemysan · Post by **lovemysan** » Thu Jun 27, 2013 11:45 pm

Those appear to be generic Chinese parts. The good stuff cost. I'd closely inspect the rings and piston pin circlips as they are the first thing to snap on these cheap kits.

For a pipe I like the Leo Vince sp3 or the Leo Vince zx. My friend runs a zx on his 100cc swap and its strong powerband. The sp3 has stronger midrange which is really important with a stock variator. There are lots of good pipes out there. I tuned a prima pipe on a roughhouse. It was a tad too peaky.

NeoGenesisMax · Post by **NeoGenesisMax** » Fri Jun 28, 2013 12:35 am

lovemysan wrote:Those appear to be generic Chinese parts. The good stuff cost. I'd closely inspect the rings and piston pin circlips as they are the first thing to snap on these cheap kits.

Has that happened to you personally? I ran a Chinese scooter for a good long while and the motor was the only thing that held up. I realize that Chinese do make a lot of cheap things but that doesn't necessarily mean it's junk. They are capable of making things that are acceptable. Although it didn't say a brand name what's photographed looks exactly like a couple of name brand one's. My point being you can't tell so well from the pictures.