Maximum RPM

[Backfire]

I wanted to know what the max RPM's are for a YTM200 if anyone knows, i rev it up sometimes and I need to know what my max RPM before I blow my motor 10 miles form home. if there's a link to a specs sheet with his info I could use that as well. Thanks.

[harryredtrike]

when it blows up(lets loose) youve reached max rpm's.there is no set number.too many factors to consider.

[bcredneck]

a ytm is a trail trike not a race trike and reving the crap out of it will slowly kill it

[Backfire]

a ytm is a trail trike not a race trike and reving the crap out of it will slowly kill it

Well, this is for safety's sake, i'm not revving the crap out of it, i don't want to shift by ear all the time and find out one day that i did one too high. I do race it on occasion for fun but im never redlining it, an'd im not power shifting it either, it's just because i'm going to put a tach on it and I wanted to know what the max was, mostly because i heard of streetbikes with a high redline and i didn't want to find out what mine was the hard way. so yeah. It's easier to talk to me in person, if you can keep up :P

[fabiodriven]

Honestly, if you can't figure it out, you should probably get a Scrambler or something. It ain't rocket science.

[Backfire]

Thanks for the helpful reply. If I can't figure it out, I'll ask for information on 3WW. Love the educated opinion though.

[ailll1]

IMO you wont blow it by simply reving it to the redline to shift. Just dont hold it there! I'm racing my SX hardcore in winter and the motor did not lose any compression at all. All you need to remember is not rev it to the sky when its cold or for a long period and make sure you got fresh oil.

[briano]

I'm with Fabio, if you don't know when to shift then it is time for an automatic. When the noise and vibration starts to drive you crazy it's time for another gear.

[NINJA]

When your valves start to float and the engine loses power and starts to burble, you've hit max rpm.

[Xpress]

If you feel that your RPM's are a bit high, then shift. If they're too low, and you're not going anywhere fast, or its bogging down, then down-shift.

[oscarmayer]

if it blows up, you know you went to high.

[WIkid500]

You wont hurt the ytm. I have been beating on mine for years and never had a problem, it's seen a lot of WOT for long periods of time. Run good oil in it and giver hell.

[Backfire]

You wont hurt the ytm. I have been beating on mine for years and never had a problem, it's seen a lot of WOT for long periods of time. Run good oil in it and giver hell.

well the problem is i have no money to replace anything in it lol, so if I do blow it up, it's gonna kill the rest of my year

[Xpress]

It's just like with a car, you listen to the RPMs, and you can kind of guess when to shift, or when it will shift.

[WIkid500]

well the problem is i have no money to replace anything in it lol, so if I do blow it up, it's gonna kill the rest of my year



But like I said.... You can't kill them. I have sank mine twice to the point it stops running, tip her up on end drain it out pull start and keep riding. The most work it used to see was when we would ice ride and it was Wide open for 4 hours at a time. Ride it. And hey if you don't want to wind it up don't. Simple.

[Backfire]

yeah i can't not wind it out, but has anyone put a tach on a trike to see how high they go? and if everyone wants me to get an automatic, you try finding a scrambler and let me know :P

[jmax857]

man just rev it as high as you feel comfortable, or put a big loud exhaust on it so you can hear it. theres deaf people that race motocross and they know when to shift by the vibrations in the handlebars, im sure you have enough common sense to know how high your bike is revving, use your judgement.

[Backfire]

http://www.facebook.com/video/video.php?v=460673987811

How's that for a loud exhaust :)

[Chazz of Blades]

Sounds pretty quiet to me.


You can't really link to facebook, only that persons friends can see things.

[WilliamJ]

No one seems to want to commit to a figure so I'll say that 9000 rpm should be a safe maximum. I a not familiar with that engine (I have a Tri-Z) but if the thing starts to gasp at 8500 (when you have your tach) then use 8500 as your redline. No point in forcing it to rev higher as it just wears it out a lot faster. What you want to do is to drop it right back into the power (torque) band when you shift.

[atctim]

I would guess roughly 6500 - 7000 RPMs Newer High performance Rev designed ATV motors red-line at 11,000 or so so I figure conservatively don't go much higher than just over 1/2 of that. Like everyone else is saying - you should gauge somewhat by ear where you want to set you red-line point for shifting.

[WIkid500]

http://www.mustangsandmore.com/ubb/SteveWmaxpistonspeed.html


There's the true way to calculate maximum RPM, it's based off of piston speed. Read up, it's good info, and you can look in a service manual to get the specs of the engine to figure out the math.

[Backfire]

Sounds pretty quiet to me.


You can't really link to facebook, only that persons friends can see things.


Well I'll youtube it then, but it's really loud when you're not the one driving it. backfires (as my name states) are even worse.

[Backfire]

Ok so I did it and things weren't adding up. I realized that i neede to conver t from mm to inches, so I did. I did 2.19 x 9000/6= 3285.

now, I read this on that awesome page WIkid sent me:
Stock Motor - 3,500 fpm (cast crank, stock rods and cast
piston)
3,500 being the maximum. I'm not sure what the pistons are made from, the trike is surprisingly light for its size (discounting tires), anybody know what the piston and crank were made of exactly?

TL;DR What's the piston made of?

[WIkid500]

Piston is cast aluminum and the rod should be forged steel. Run the 3500 fpm number

[Backfire]

So I'll set it for 8500 RPM max, until I get ballsy like all trike riders do :lol:

[ailll1]

How is this going to help you to know when to shift? You know whats your max RPM but I'm assuming you dont have a tachymeter... Kinda useless to know max RPM then.

[Backfire]

I am planning to put in a tach when money's not so tight. and yeah i just need to know so i don't wreck the motor. i like tachs a lot as well lol

[jmax857]

I am planning to put in a tach when money's not so tight. and yeah i just need to know so i don't wreck the motor. i like tachs a lot as well lol

just go buy one from wally mart get the biggest honker they sell, get one with a blinky light too bud.

[Backfire]

I like blinky lights...
Seriously though, are you able to setup the tach where the light turns on at or do you buy a specific type?

[fabiodriven]

Face-palm!

[79fordblake]

Face-palm!

Somehow I knew that was coming, lol.

[Bretmd94]

Soooo.... You don't have any money to fix the bike if broken, but you want to waste money on a tach so that you don't blow your motor???

Are you messing with us? You just want a tachometer to have a tachometer don't you?

If your riding a trike, there are more important things to look at than the tach every time your shifting.

And if you are worried THAT MUCH about breaking it, short shift all the time and don't go past half throttle.

[Backfire]

If you were ACTUALLY READING, you would have seen that I said, later on when money's not so tight.

[Backfire]

Anyway, since everybody wants to make fun of me, I'm closing the thread.