performance difference
 

just purchased a new os .12 cvr to replace the mach .15 in my xxxnt.

what can i expect?

RE: performance difference
 

a brutally reliable engine, roughly the same (maybe a LITTLE more) power, and wheelies on command:)

the CVR is a GREAT ST engine, just flat out great.

RE: performance difference
 

it says in the manual that there should be perfuse smoke during break in.

i have the high speed 5 turns out and i still cant get it to run "cool". it runs great and has AWESOME power, has some smoke, but for the amount of turns i have the high speed jet out, it should be falling on its face. no?

i dont want to burn the motor up!

RE: performance difference
 

i always ran 2.5 turns out on the HSN on my CVR's, and IIRC 2 turns out on the LSN.

RE: performance difference
 

i dunno, sumthin's goofy with my high speed needle.

what temp should i be at?

RE: performance difference
 

not sure, but just keep it between 200 and 250 during breakin.

after breakin, just keep it under 300.

RE: performance difference
 

hmm maybe i am in the ballpark.

i swivled the fuel fitting around on the carb to match where the old engine had it. is there something to match up on the fittings?

thanks for the help.

RE: performance difference
 

as long as you have it tight, you dont have anything to worry about...but 5 turns out on the HSN sounds WAY high unless they've changed the CVR's carb in the last 6 months.

RE: performance difference
 

well i should check something, the last tank i did the water drop test on the head, and it just boiled right off.

i would like to fatten it up, what should i check for?

the motor is brand new as of today, as well as fuel line.

thanks again!

RE: performance difference
 

just make it way richer, all carbies are diferent , the no. of turns out dont make a diference, the temperature of the engine does!
just richen i up until the water only JUST bubbles after 3-4 seconds and youll be alright. BTW the OS .12 CV-R is SWEEEET!

Dann

RE: performance difference
 

basically, my breakin with OS CVR's is 2.5 turns out on the HSN, 2 turns out on the LSN, run for a tank, let cool.
bring it in to 2 1/4 turns HSN, and run it a little harder...and so on and so forth.

I never temp my engines.

RE: performance difference
 

how far can i turn the HSN out before i have to worry about it falling out or having a vacume leak?

at these settings i will NEVER be able to run this thing in the winter.

RE: performance difference
 

just turn it back in to 3 turns out. hold on, lemme go play with one of my CVRs real quick

you have your HSN out too far:P go back to about 3 turns out;)

RE: performance difference
 

how many do u have?

Dann

RE: performance difference
 

3 complete ones...
probably 4 or 5 that are unassembled[&:]

RE: performance difference
 

ill try tomorrow thanks!

RE: performance difference
 

I have a .12 and it is AWESOME I run this baby every ware and it always turns out great. Lol and yes if you wnat it can be a trigger activated wheelie ;)!

RE: performance difference
 

ice, any luck?

RE: performance difference
 

the thing really runs great! just hotter than im used to. so much quieter, faster, and lighter than the mach...sweet!

i have plenty of smoke and its even putting some exhaust shmee on the left rear wheel.

now i have to go get a new spur gear:D

RE: performance difference
 

glad ya like the engine[8D] i love the little suckers:D

RE: performance difference
 

LOL ME TOO :)! hey what kind of gearing are you gona do? Love to hear what people do with there O.S :):):)

RE: performance difference
 

stock 51...that thing is perfect for what i do.

maybe if i start racing it, ill get a bunch of them.

RE: performance difference
 

i geared mine lower, but i have a rusty so the stock gearings kinda high and i can tell you the cv-r eats a trx2.5r, absolutely no competition. im running 25% when i race and only 5% bashing it so it proves what a versatile engine it is, other thing i like is that it only needs to be tuned once a week or so (unless i change %) and thats probably the best thing about them, oh, did i mention theyre hell fast!

Dann

RE: performance difference
 

Yah but you can never stop hearing those words...
THEY ARE FAST
They are fast
they are fast
... Oooo yah!
I have stock gearing on right now probally gona change it soon.

RE: performance difference
 

that coz they are fast, that coz they are fast, that coz they are fast, that coz they are fast.
LOL

Dann