Extreme head kits

Finally they will be arriving sometime this month at about the same time as the ForceWorks ECU!.
I have copy/pasted the below from the zumaforums, be sure to check in there for updates!.


What is it?

The Extreme kit is the final upgrade for existing Samurai 155cc and 164cc big bore kits.

What is in the kit?

A specially designed head complete with cam,valves,retainers and springs.
The valve and port size is designed to maximise gasflow from the 58.5mm bore.
The cam is also specially chosen to do the same.

What do we gain from this?

Good old fashioned horse power!.
On a 4 stroke engine, all of the power is in the head, already with just the stock head we are able to squeeze out 13-15bhp at the wheels, this head will allow us to push to the high teens (results thursday).
The whole point of this kit was to give a bolt on upgrade with only a basic knowledge of engine assembly.
No need to bore out the case, just remove and replace!.

How much will the kit cost?

No higher than $400, but you will need to have one of our big bore kits, force works ECU and a 32mm throttlebody already installed in order to use this kit.
Price may seem a bit high altogether but this isnt supposed to be down all at once, its a progression in stages with this being the final one.

What are the stages?

Stage 1) CVT & CLUTCH
Stage 2) 155/164 big bore kit
Stage 3) 32mm throttlebody
Stage 4) ECU
Stage 5) Extreme head

What about the exhaust?

Good point..... this is a major headache/problem for me.
The exhaust will need to be able to flow more gas than pretty much anything on the market, so there are going to be differences (or restrictions) in power depending on what exhaust you use.
I do have a solution for this, WRRP is making an exhaust which works better than anything else on the market with the 58.5mm big bore kits and will also work well with the extreme head.
This will be the exhaust used for the dyno test.


This thursday i will be posting pricing news and dyno results from the Extreme conversion done on my wifes bike

Force Works ECU

Exciting news!.

We are about to start offering the Force Works ECU in mid september, this clever little box allows you to adjust the fueling on your Samurai big bore kit equiped bikes!.

As standard our big bore kits are held back by the stock ECU, as you approach about 40mph the fueling starts to go rich and this lowers your power at higher speeds, reducing your potential top speed and also drinking more fuel than its supposed to.

With this ECU installed you can take away or add fuel with a simple button press, no engine lights, no need to restart the bike, you can do it on the fly!.

Check this link for more information:

http://www.zumaforums.net/phpBB3/viewtopic.php?f=54&t=13223

Back to normal

Since getting back online i have had a rather large amount of emails and PMs (totaling about 45) some are questions others are people chasing up their orders (rightly so!).

Shipping has returned to normal, its Monday and the EMS guy is collecting packages, invoices are being printed... everything is as regular as it used to be.
I have also started building another monster GY6 engine which is destined for Norway.


Some people get a bit frustrated by our response time, please try to understand a few things:

1) This isn't our full time job anymore, we have a large shrimp business that keeps both me and the wife busy (www.seafortunes.com)


2) Time difference, since we are located in Taiwan we are about as on the other side of the world as it gets!.
This means there is a 16-12 hour difference between us, so usually we are in bed sleeping and only get to the email another 8 or so hours after its sent.


3) Our mail server has very strong filtering, i have often lowered the filter but almost instantly our in-box just get filled with spam!.
So if you don't get an answer within about 48hrs, chances are you have been filtered out so please try again with a different subject title without CAPITALS!.


4) PM's, i am not always on the forums, the best method for contacting us is by our company emails:
sales@samuraiscoot.com & care@samuraiscoot.com


5) Please remember we are not a large business, this is purely just a hobby of ours, there are only 2 of us and sometimes we make mistakes. Its what you might call a mom and pop business.
Now there was a point where things were getting serious and we were looking to grow, after a lot of talking we decided to keep things small and simple, this way its still our hobby and not just a 'job'!.

6) We try to keep stock with the most popular items, but its not always possible to tell whats going to be popular one month to the next.
Our suppliers or to be honest all suppliers in Taiwan are just a pain in the backside, no matter how much money or how much time you give them, they can drag their feet and waste infinite amounts of time (yours and ours!) so sometimes orders can lag, we will always try to keep you up to date or let you know if the parts are not in stock.

Hope the above is some use to you!.

PC meltdown........ again

Once again our pc went into a meltdown, both my vista and windows 7 install failed to boot and i was stuck without internet access for close to 3 days.
To make matters worse it was the only pc in the household as my wife traveled to china for business and took the laptop with her, i do believe she emailed a few people telling them of the problem.

Now the pc is fixed and healthy again (its a cooler master cosmos case which weighs 30kgs, i had to carry this to a repair shop in Taipei in the 40c heat!) turns out my 3 year old was inserting money into the air vents and caused a meltdown of electrical shorting which corrupted my hard drives (all 3!).
You couldn't make this stuff up!.

Problem is our email account is built into the website and its not just a straight forwards log in, i had the link saved on my pc before and just accessed from that, but now that link is lost and i have no way of getting into my email account until my wife returns from china tomorrow night.
If she goes online in the mean time i should be able to get the link from her.
Those of you who are trying to contact me can do via facebook.

People who made orders last month can relax as everything was shipped between late last week and this week.

Monster GY6 engines

Though is has been a quiet summer, we still managed to keep ourselves busy with another project.
What you are looking at is 2 brand new monster GY6 engines.

You are probably wondering whats so special about them?.

Well unlike all the chinese GY6 clones, these GY6s have a special case which allows us to use a much larger 67mm bore, the normal GY6 can only manage 63mm.
On top of that we use a monster 8mm stroker crank to make a rather insane 231cc!

Theres a little more to these engines besides a large displacement, they also have a hand ported big valve head (still 2 valve by the way) custom intake manifold with genuine Keihin PWK carbs.

Both of these engines look the same but they are for different uses, one of them is for road use and the other is for the drag strip.

Power output..... well its unknown as we are the only people to do this setup, but i would guess about 20bhp with a mega flat torque curve.

Enjoy the pics.

Ruckus shocks!

Slow to update as we have been busy with other projects!.

Anyway, remember the post about my visit to RPM?.
Well take a look at this:

This shock is truly special and likely to take the ruckus/zoomer scene by storm!.
This is RPM's very best shock downscaled for the ruckus.

No more poorly made cheap chinese shocks, this is the first true 230mm performance shock, allow me to go over its features.

Cartridge bearing top mount to ensure smooth running
Hand polished internals
11-way rebound adjustment (real adjustment!)
10mm offset
CNC machined rebound adjustment (not rubber)
Linear spring
High quality seals
Hand made in Taiwan
Desgined for heavier riders (200lbs)
2 year warranty

This one is our first sample, testing will be done next week.

New pistons!

The wheels may be moving slowly over at Samurai these past few weeks but that hasnt stopped us from making a dramatic change to one of our most treasured products!.

Our pistons, famed for being the best on the scooter market have been given an upgrade at no additional cost!.

We now have them W.P.C treated (as standard!), this is a special process that coats the piston in a coating which reflects heat, increases strength and also acts just like teflon.
We also coated the inside of the cylinders too.

All big bore kits ordered after the middle of may were given this upgrade and all future orders will too.

As it stands we are the only piston supplier on the market that offers this service as standard!.