Hey fellas, I'm thinking of getting a YS .45 to use on an ultrastick 40. How do they stack up to other .45's? Are they worth the extra green$? What are your impresions of it? I had a YS .60FR and it was an awesome engine - I just hope YS stuck to their powerful tradition with this one!

Worth every penny!

Other than my Jett-50 it is the finest engine I have had in 17 years...

It is kinda like the Rossi's the 45 has the power of a 60- (if set up properly)

It is really meant to be run with a tuned pipe (Macs 7.5CC) but runs extremely well on a stock muffler- Put the tank anywhere you want, and have instant throttle response...Just use a good quality tank like Hayes (cuz the pressure..)

Do a search on here for YS-45.... and grab a snack!

james

If you get it, also get the tuned pipe of your choice. The one that doesn't work well on the YS45 in the UltraThrust muffler. This engine runs well with the stock muffler, but lacks the power it can develop. With standard muffler it is about the same as the OS46 FX.

Greg

How about the YS .53 4 stroke? How would it handle that Ultrastick 40?

Pylanton,

Any .40 two-stroke engine is strong enough for this bird.
The YS.53FZ is no longer in production, but it was tested to spin a 12x6, and 12x7 APC props, faster than most muffler equipped, .60 two-strokes.

Supercharging makes it that powerful, but it was tested with 30% nitro, liquid gold heli fuel.

The web page (in the UK), where I saw this engine review can no longer be accessed, for some reason.

It overheats with anything less than 20% nitro and needs this expensive fuel to run properly.

If you can find a NIB, or a very good used unit, it will fly your 'Stick like a bat out of hell...

Dar is right on, my .53 turns a 12x6 three blade at 10,580 richened down from peak about 1/8 of a turn on the high speed needle. It's just about an even match for a Saito .72.

my .53 turns an 11x8 @ 11,800 rpm. Right now I'm running an 13x4w apc on it in a extreme 330.
I love my 45's. My first YS was a 45 and thats what made me a YS man forever after! I finally blew a bearing out of it after 10 years of flying it. New Boca bearing and itsgood to go again.

What kind of fuel would you use in a .45?

tower advertises the ys .45 as an ABC but my pair of .45FRs from 15 years ago are ABN. are the new engines really ABC? and if so are the parts compatible?

for fuel i use 18% klotz benol and 15% nitro and they seem to love it.

dave

Dave,

YS sleeves are similar in process to "Nikasil". Developed by Mahle, it is used by Mercedes-Benz and BMW, in their full-size aluminium engine blocks. It is also used by Rotax, for many engines including two-strokes.

Why not contact Yamada in Japan, to ask them what their exact process is?

i can see nikasil being used on a ringed engine but not on a lapped piston, maybe their 4-strokes use this process? anyways i guess i'll try to get an answer straigh from yamada.

good to see you back at the keyboard.

dave

How many turns out from the closed position do you guys have your needle set?? What's the starting point - about 1 3/4 turns, right?