Hardtime

Hey how's that KWA motor working? I would think itis justplain scaryin those full throttle runs.
As the ice is starting to take over the pond I had time for another set of speed runs
New carb. installed,upgraded the exhaust manifold and added more venting.
AAhh now we're talking. I don't know if it's the cold water or the mod's but now close to 60MPH !!
Just over 4 gallons on the motor now and had 3 runs 1st. 57.7, second 58.1
It took the whole pond but got it to 58.65. I'm almost ok with that as
it pulls well in the mid 50's and handling is much better in the 50-55 range anyway.
Well dry dock time. Have some thoughts for minor hull mods and
Chris... maybe Venom could make a Skeggedstrut blade for us

P.S. No pull start problems here.
Later....likeSpring, when the ice melts

srt10

My Feedback: (20)

Man, I need to get my KOS back in the water!!
but I may sell it?

Hardtime

Did you get your boat running?
Or are ya frozen in too?
It would be nice to see some pics. of thse running some where warm.
No maybe not it will just the wait worse.
Well at least I can work on it. OOOOh
Later

Anyone WT-257 vs WT-771 vs WT-813 vs WT-668
on stock motor + tuned pipe So far I like the WT-771
Has anyone done some testing with these carbs?

srt10

My Feedback: (20)

What did you notice going to the WT-771?

danielplace

10", surely you jest. Has fixing the problem ever crossed anyones mind? That's crazy. I am sure you could fire one in that short pull but to exceed it and do damage doesn't seem to good. Must be hard to keep replacement starters in stock.

Hardtime

Wt-771 carb. holds settings well, tuned easy and added 1.5mph to the top end maybe more ?
Wt-257 Ididn't like impossible to tune and setting would not hold.Tried on my5B with sameresult. Could be just me.
Seems my old carb. could not supply enough fuel when wide open and would go lean.
This would cause loss ofpower until the temps went down then ok again.
With the new carb. no problem. I also have the WT-668 on my 5th scale it too works well.
Don't have the weather to test between the 668 and 771 so that will have to wait till spring.
Don't have the WT-813 so cann't compare.
Maybe others will post thier findings as well. Cann't wait as I'm sure I can hit 60mph.
I thought i'd never hit 55 now that's like the norm. That's15+mph gain from out of the box stock.
Wow

Hardtime

Looking in manuals for other motors of this type including my mod. motor in my Baja 5B they all
say the same 10" is the norm.
I have friends that go through pull starts like 3-1 as compared to me with the 5B.
I've have the same stock pull start in my boat for 4 gallons + with no problems.
Yes I've lifted the hull off it's stand several times and still works perfect.
PS. If you have a remotekill switch make sure it's not turned on when trying to start. lol

team esp

Hi. Just got my KOS in the water for the first time today. I run a high ratio of oil in my fuel mix for some other motors (mods,QD's,...), so it took a few runs to get it dialed in. Once I got it close to where it should be, it really took off! It's totally stock right now, but I'd have to say I'm very impressed with the quality. The glass work and paint/graphics are much better than I expected. It appears to be a well built boat. I didn't have any issues aside from having to snug up the exhaust flange just a little.

I wanted to try some other props but ran out of time. I also had a modded WT-257 with me that will have to wait for next time. I was pleased with the speed seeing how it basically has just a canister muffler. The hull is predictable in corners and straights, and looks totally scale at rest as well as at full speed. I have been looking for a cat hull that has the scale appearence of this one for years now. The closest I could find was the Expresscraft Thunderbolt, but always wished it was a little longer.

The motor ran great and started up easily. I had no issues with the starter. Short quick pulls were the way to go. When warm, I could get her running in one short pull (about 6").

Thanks to the info in this post, I already plan to swap the carb, drop a pipe in her, and try some props. I can see myself switching to a 1/4" flex shaft down the road.

My vids from today are horrible, so here's just a pic next to my AC Razor-

danielplace

Very nice. I really like the looks of the King of shaves and Razor's I just love. Sweeet.

Hardtime

Lucky you ....I need a V-hull for those days it's too rough for the Cat and it's always fun surfing the waves
Added a coulpe of the inside of my hull picsin post #1210.
Later

srt10

My Feedback: (20)

I may have missed it, but could you give me a run down of what you have done to your cat to get these speeds?

Thansk![8D]

Hardtime

See post #1189 added WT-771 and gained 1.5mph+.
Also moded the props and did some work on port matching.
Still have a few things to try

srt10

My Feedback: (20)

That's it?
everything else is stock?
so this is a out of the box 50mph boat?

Hardtime

Well I wouldn't call it stock see post #1189 it lists other pcs not including the carb.
I got 39.7-39.9 mph out of the box stock after brake in.
The cost in time is way more than the cost of the hop-up parts but that's what is all about.

srt10

My Feedback: (20)

Cost in time?[sm=75_75.gif]
oh brother...

Thefarside

Hi, I just bought a used KoS and I would like to know what is the stock dia. and pitch of the prop? And if I move up to a stock Zen what would be a good size to start with?

Thanks John

Hardtime

[X(]move up?
Stock Zen will perform nothing like the stock Sikk. Sikk is way more bang for the buck. If you don't plan on modding it out stick with the Sikk. Stock prop. is ....I think 68.5mm x approx. 105mm pitch approx. 2.69" x 4.1" pitch.
Would work fine.
P.S. My buddy has been chasing my Sikk with his mod Zen all summer with no luck. He paid near double what the Sikk is worth .
Also advised by one of the top zen. builders that indeed the Sikk outperforms the Mild mod. Zens.
How fast do you want to go anyway? The Hull gets wonky at speeds past 55mph and I'm hitting 60 +/- a couple mph with my Sikk.
Runswell in the mid. 50's but after that you're looking for trouble. After all this is a Sport boat not a Race boat.
Have Fun

V5150H

I've only had my boat out once but found out pretty fast that it was the water choking the exhaust outlet as its right on the water line. I had to launch the boat on its right side while giving it some throttle. I didn't have to use the kill switch when coming to shore as it would just stall anyway when at slow speed. May need to put a bit of weight in the front of the boat.

Also, has anyone done an easy fix for the exhaust o'ring problem using a tube gasket or similar? Instead of buying a new pipe.

navy47

My Feedback: (59)

To Chris form Venom, I bought 2 new 26 cc engines from venom.I have been trying to get one of them to start. I have soark but will not eaven fire. I have tried it at fule thro and still noe fire., Any help?
Thanks Tom[&o]

aviatorg3

I just bought a King of Shaves gas boat. I also have the KWA hop up motor. Dual pick-up rudder, and a tuned pipe. Ican't seem to figure out how the new KWA motor mount lines up on the engine rails. They don't line up on stock locations. Also does anyone have a diagram of tubing for the dual inlet head? Which are the inlets and which are the out? Thanks.

5150Cat

I think I'm all over one of these boats while I build my Hunter......

Who do you guys to through to get the Sikk motors? Any preferred dealers here in the US?

Mike

srt10

My Feedback: (20)

DDM is a great place to buy motors..
26cc version
http://www.davesmotors.com/s.nl/c.88...it.A/id.972/.f
and the 27cc version
http://www.davesmotors.com/s.nl/c.88...t.A/id.5521/.f

xxxtcr

I have my KOS up for sale, although it is now a miss bodyline, If you read back through this thread in posts I have made, you will see all the mods I have done to it, PM me if you are interested.

tc4 drft

Why are you sellin it?

xxxtcr

I'm doin the rc car thing right now, want to get a brushless one going somewhere down the line.