F-270 Four Bolt
New Chung Yang F-270 4 Bolt Base Engine Specs


now i know many are going to reply about plating issues and all the common cy issues many have faced in the passed, To get things straight so that we can use these engines with out the reliability factor being in the toilet.
the new design is very promising i will provide a link to where u can view pictures of the very impressive 4 bolt 230 as well. no 270 pictures are available as of yet, but the internals do look the same. there are many positive changes on this new cy, among them is better plating which appears to be excellent! the new cy case will accept a zen top end with the simple change from the torx bolts supplied to a set of Allen head bolts.
the dome has a flat squish area, the intake side transfers are higher than the opposing transfers, the int and e. ports are 180 degrees of each other, the piston ring locating pin has been centered on the intake side of the piston, the exhaust port has been moved up, the piston skirt has been modified with a larger cut out in the skirts, along with many other high performance geared improvements! the engine is a true 26.9cc, it has a 35mm bore and 28mm stroke, a combo that always makes great power! enjoy the info, soon more to come!


and the link!

www.emjayltd.com/recent-news/c...30-disassembly/


27cc, 35mmx28mm Bore & Stroke

Made to compete with the Komatsu/ Zenoahs in that size category.

F 270 New Version Engine:
1) 4-Bolts Crankcase
2) 4-Bolts Cylinder
3) New Piston
4) Powerful Clutch Spring
5) Lighter Clutch Shoes
6) Big Muffler
7) Star shape bolts

F – 270 Specification
Model (2 Cycle Gasoline Engine) F-270
Cooling Type Air Cooled
Displacement cc 27cc
Bore mm 35 x 28mm Stroke
Max. Power PS / rpm Unknown
Max. Torque kg-m Unknown
Min. Fuel Consumption g/PS . H 500 Two Bolt 23 550
Fuel Recommend Pre-mixed (25 Gasoline : 1 Engine Oil)
Oil Recommend FC grade 2 Cycle engine oil
Ignition Type TDI
Carburetor WT-668
Spark Plug Std. NGK: CMR7H
Starter Recoil
In rpm Unknown
Clutch
Stall rpm 10,500 Two Bolt 23 8000
Length mm 158 Two Bolt 23 168
Overall Size Width mm 240 Two Bolt 23 150
Height 199 Two Bolt 23 197
Weight kg. 2.24 Two Bolt 23 2.56

Me i run for the fun and sport of the hobby and do not race .I pay a lots to have my boat build and running .And to just beat on then is wrong just my two cent .I run Zen and CY to any weed wacker engine .If any boat and engine id build right and set up right and you do the right Maintenance of cleaning and oil of engine bearing and checking after every use it.Also mixing the the gas and oil right .This will give you year of fun

Good Day
Sounds like a infomercerial for Sikk - I guess if the only engine you ever ran is a Sikk then it would be good. When you get to quality and compatability go Zen.

As a note I have never even seen a race but do build several boats a year and have for 10+ years. So I'm not a Racer

Sikk needs to do improvements --- A LOT OF IMPROVEMENTS starting with case

Why would I spend money on a 4 bolt Sikk when a RCMK is cheaper, better quality and more horsepower

Many computer warriors and 'racers' out there but poking your head out to tell everyone how good something is when you have no experience with other products only shows how little you know -

Have fun (invest in recoil parts)

Oh and don't insult us by saying 'we don't know how to mix oil and do reg maintenance - give me a break

And I build my own boats - i don't pay people to build boats

Randy

LOL I never said i do not build my boat .I been building RC boat /car/plane with over 25 year experience with RC and over 40 year with model train and x owner a hobby shop for 15 year .I use all made motor from Gas , Electrics ,steam and all make have some thing wrong with them somewhere and some are bad apple some not .and for recoil all make and model small motor recoil will break .And for motor mfg i use all and the only engine that broken one me was a 7.5 k&B out drive the flex shaft went .I do not tell people in the boat to buy something because some one like them better then some one else say it better to just buy what u like and have fun that what hobby all about .Thank for the reply on my post . man i am sorry i post this

Actually you said "when I pay good money for people to build my boats" - then went back and edited it

Spare me

What's there to be sorry for

---

I stand by what I said and have no need to change it

My view (After have maybe 25 gas engines and still have 3 Sikk) is they are a 'short term disposable engine' kinda like cheap import cars

Pretty much a waste of breath (typing) here as you think they (Sikk) are great .........

Me ..... I think NOT ... a waste of money

Randy

Pay good money for people to build my boats" - then went back and edited post. Change what? .I said me i run for the fun and sport of the hobby and do not race .I pay a lots to have my boat build and running
To have is not people it saying I pay good money for my boat build and running that like money for wood parts, money for motor, money for radio. Money for other item use to build boat
Yes I edit post only to add cap letter and my son check spelling for (lol not good with keyboard ) and ever change any word just cap and spelling
I put sorry for post because I forgot about people that like to bad mouth anything that they do not like
Like I said it a hobby and it is to be fun

Edit edit

or if someone does like your view then ........... we must be wrong

Whatever .............

Sikk equal ........... that's laughable

Guess you never heard of RCMK - Quick Draw or J&G

---

they equal to SIkk too ol

And I do have fun

I think the reason most people, including myself, are reluctant to think of CY engines as comparables to Zens is quite simply because of their past track record. Who knows though, maybe they will end up with a better engine this time around. Time will tell.




www.modelgasboats.com

Sent from my iPhone using Tapatalk.

I had Carlos rework my 2 Cy 27's in my Kat... He was impressed with the way they are now built (2mm stroker, porting, sososo) but that probably won't change the way he feels about Zenoahs, because they are a proven screamer. Me, I'm happy as can be with my CY's, and I love my Jersey Skiff with a Zen. I think the biggest issue is, "what do you want to get out of the hobby?" I've built boats with weedeater motors and had a blast with them!!! It's the same as the old Chevy vs. Ford battle...piss on both of them, I'll stick with my Toyota!!!

I mean come on guys...take Woodie and myself for example. We jack with each other, but we never down each other!!! Or their opinion.....

Race, sport, or S#@T and giggles, in the end...IT'S ALL JUST A HOBBY!!!!

Have a GREAT day....Doug.

Ok guys ... every one has an opinion and in here the right too share their view.
No need for any tensions or piss on em type comments (isuzudude)

Sadly for Cy/Sikk the damage is done and getting back old customers or new ones for that matter when the word on the street is not generally positive

It is a well known fact by those in business that keeping existing customers and getting new customers by word of mouth is a FAR FAR FAR easier job than doing damage control and PR articles such as posted to get once loyal customers to return along with those who believe what they read and get told by other users.

Personally seen far too many burnt up cranks, bent rods to take them very seriously at this juncture ( see just another opinion ) Looks and quality of the execution making a Very Nice looking product has never been the issue, actual quality of the metallurgy used is