My 460 Stoker EX... Coming together!!!

[kolby2004]

Hey fellow EXers just thought I would post some pics of my 460ex. And see if anyone has anything to say about it so far.

My Story:
I had some issues with my motor knocking awhile back and I send it to one of the guys I met on this forum and he rebuilt my motor and painted it! He explained to me that using the stock carb and just a slip on pipe(thats what I was running before the motor was having issues) was basically holding back some serious power that could be unleashed with my 460 stroker motor and port work. So I bought a 450r carb($110 from ebay) and a Curtis Sparks X6 Big Core full exhaust ($572 after taxes and shipping from Sparks Racing). Right now I've got everything ready except I'm just waiting for an intake boot from my local honda dealer and then I can install the carb and fire up this Bad Boy!

Some questions or things I want to ask you guys that have have Big Bores and other motor mods done, What would you consider to be a good "break in" method for me to get it "broke in" without "destroying" the motor?

Anyway... Let me know what you all think. Most of my Mods are in my Sig.
Thanks,
Kolby

Here are the Pics!!!

<a href="http://s179.photobucket.com/albums/w309/kolby2004/?action=view&current=460_Stroker_Curtis_Sparks_X6_Big-6.jpg" target="_blank"><img src="http://i179.photobucket.com/albums/w309/kolby2004/460_Stroker_Curtis_Sparks_X6_Big-6.jpg" border="0" alt="Photobucket"></a>

<a href="http://s179.photobucket.com/albums/w309/kolby2004/?action=view&current=460_Stroker_Curtis_Sparks_X6_Big-5.jpg" target="_blank"><img src="http://i179.photobucket.com/albums/w309/kolby2004/460_Stroker_Curtis_Sparks_X6_Big-5.jpg" border="0" alt="Photobucket"></a>

<a href="http://s179.photobucket.com/albums/w309/kolby2004/?action=view&current=460_Stroker_Curtis_Sparks_X6_Big-4.jpg" target="_blank"><img src="http://i179.photobucket.com/albums/w309/kolby2004/460_Stroker_Curtis_Sparks_X6_Big-4.jpg" border="0" alt="Photobucket"></a>

<a href="http://s179.photobucket.com/albums/w309/kolby2004/?action=view&current=460_Stroker_Curtis_Sparks_X6_Big-3.jpg" target="_blank"><img src="http://i179.photobucket.com/albums/w309/kolby2004/460_Stroker_Curtis_Sparks_X6_Big-3.jpg" border="0" alt="Photobucket"></a>

<a href="http://s179.photobucket.com/albums/w309/kolby2004/?action=view&current=460_Stroker_Curtis_Sparks_X6_Big-2.jpg" target="_blank"><img src="http://i179.photobucket.com/albums/w309/kolby2004/460_Stroker_Curtis_Sparks_X6_Big-2.jpg" border="0" alt="Photobucket"></a>

<a href="http://s179.photobucket.com/albums/w309/kolby2004/?action=view&current=460_Stroker_Curtis_Sparks_X6_Big-1.jpg" target="_blank"><img src="http://i179.photobucket.com/albums/w309/kolby2004/460_Stroker_Curtis_Sparks_X6_Big-1.jpg" border="0" alt="Photobucket"></a>

<a href="http://s179.photobucket.com/albums/w309/kolby2004/?action=view&current=460_Stroker_Curtis_Sparks_X6_Big_Co.jpg" target="_blank"><img src="http://i179.photobucket.com/albums/w309/kolby2004/460_Stroker_Curtis_Sparks_X6_Big_Co.jpg" border="0" alt="Photobucket"></a>

lookin nice! how do you like the dual rate springs on the R shocks? its just a sping kit not a revalve right? start looking for new tires cause thats gonna rip!

[kolby2004]

My front shocks are 450r's and they have been revalved and resprung (Dual-Rate) by GT Thunder and I love them!

[TheNewn]

What slip on did you have? might be interested in buying it.

[hypersnyper6947]

That thing looks sick, cant wait to here about it. To break it in do hard accelerating and decelerating, only to about 1/2 throttle though. Never run at one single speed always be accelerating or decelerating. This puts pressure on the rings to push them up against your fresh hone so it seets the rings nicely. Do this for like the first 20-30min of riding then just ride normal for the rest of tank, just dont drag race or anything. After that your good. Make sure and let it warm up first of coarse, and change your oil after the first tank to get rid of all the metal shavings form the break in. Do you have a new cam too b/c that will change things alot.

[kolby2004]

TheNewn: I PM'd you about my Dr. Dubach Slip-On I have for sale!

[kolby2004]

hypersnyper6947: I did get a brand new Hot Cam Stage 2 installed! : ) Thanks for the complements!

[katch26]

thats one sweet pipe.....just out of curiosity are you going to run into any problems with the clutch cable sooo close to the head pipe?

[kolby2004]

Well thanks. To be honest, im not sure if I will have any issues but it should be the same as any other 400ex b/c the cable runs down by the exhaust on a stock 400ex anyway.

[hypersnyper6947]

Your going to have to break in the cam first before the motor, there should be instructions in the hotcam box, do that then go on to the break in i described. My clutch cable is like 1/4 in from my pipe, as long as its not touching your ok.

[kolby2004]

I do not have any boxes from the motor build b/c I did not build the motor.
When I turn my bars all the way to the left the clutch cable gets really close (like 1/4 inch) from the exhaust header but does not touch it.

[katch26]

like he said you should be fine it just looked like (in the pic) that is was actually touching

[hypersnyper6947]

go to hotcams web site and see what it says for break in, if you cant find it i will look for my box to see if i still have the instructions

[kolby2004]

Here is what I found on the Hot Cams Site:

Upon initial start up it is very important you DO NOT let the engine idle. We suggest running the engine for at least 30 minutes of run time, at 3000 rpm or better. We recommend a light trail ride-to maintain the engine RPM above 3000 rpm. Only light engine loads are to be used. No excessive rpm or lugging. Let the engine cool. Check your valve clearances again with the entire engine at room temperature.

So... when I start my motor for the 1st time I really cannot let it idle? Do you think this is necessary even if I had a new sleeve and new piston installed? I didnt think that I had to start it and ride for 30 min the very first startup. Im workin on this in town and dont have any room to ride it right away?!

[scuzz]

I would assume that you wouldn't want it to idle for long, but that after you've been through the RPM range the rings will seat and the cams will have more oil for lubrication/break-in.

[hypersnyper6947]

When you are doing your light trail ride of 3000rmps or better try not to stay at one speed. As soon as this is done do some good accelerations to make sure and seet the rings.

Start it at home to make sure it starts, then shut it off, take it to your local riding spot and do the break in.

[kolby2004]

Thanks guys for all your advice! I'm pretty sure I know what I'm going to do now. Also, just FYI I am going to put my stock carb on it to do the break in, after the 1st tank of gas...change oil... and then after that I will install the new 450r carb and Jet it. Then After I have had a couple tanks through it do you think I am good to take it to the dyno and get it jetted correctly?

[kolby2004]

Oh and one more question. I am waiting to get the O-Ring that goes between the head and the intake boot. They did not get it in today and I really wanted to get this thing started. Do you know if I could buy something to use as the oring or find one at a local store that would work?

Here is an image. I need part number 13.

<a href="http://s179.photobucket.com/albums/w309/kolby2004/?action=view&current=intake_boot.jpg" target="_blank"><img src="http://i179.photobucket.com/albums/w309/kolby2004/intake_boot.jpg" border="0" alt="Photobucket"></a>

[scuzz]

I would say one or two tanks would be plenty for a break in, provided you have jetted correctly.

Make sure that when you bring it to get it dyno'd you bring it to one that can sample the exhaust gasses. This way you can make sure that you're running at that magical number for fuel to air...

(and also so you don't burn it up on the dyno)

[togup]

To break in rebuilt motor ,motor,carb,and air filter need to be clean.Start engine and with a fan blowing on it run at idle for 10 minutes,then shut it off for 30 minutes.These steps should be repeated one more time.Next ride 10 minutes at 50% throttle making sure to vary rpm stop let it cool for 30 minutes. The next 10 minutes go to 60%, repeat this process until you reach 100% throttle.

[scuzz]

Wait for the correct o-ring, you don't want to chance a leaking intake and leaning out your engine at WOT....or even worse doing the same as it sucks in the incorrect o-ring.

Take you're time, you've waited this long, don't throw it away now...

[scuzz]

Originally posted by togup
To break in rebuilt motor ,motor,carb,and air filter need to be clean.Start engine and with a fan blowing on it run at idle for 10 minutes,then shut it off for 30 minutes.These steps should be repeated one more time.Next ride 10 minutes at 50% throttle making sure to vary rpm stop let it cool for 30 minutes. The next 10 minutes go to 60%, repeat this process until you reach 100% throttle.


Um....no.

You can't re-jet it doing it that way and he'll run lean/hot. Jet and then vary the throttle position. I have never hear of anyone doing it the way that it was described above.....

[togup]

Originally posted by scuzz
Um....no.

You can't re-jet it doing it that way and he'll run lean/hot. Jet and then vary the throttle position. I have never hear of anyone doing it the way that it was described above.....


Sorry ,you feel that way maybe it is wrong for his situation but I stole that from May 2008 ATV SPORT magazine break in tips for four strokes

[TURBO-530R]

Kolby left you a phone message.

Also just laid down 50.4 Hp and 39.1 tq with my little ex I just put togeather. Jim

[drew416ex]

Im not trying to burst your bubble, but you may not be happy with the hotcam stage 2. I had it in my 440 stroker and it fell on its face up top. The stage 3 woke it up though :D . I dunno, you might like it like that. Either way, you will love the torque of the 460!

[kolby2004]

Turbo - 530R -- thanks for the phone message, I took your advice and made a gasket for my intake boot! Will fire her up tomorrow morning! Thanks

so this 460 stroker build has 50.4HP and 39.1ft lbs?

[kolby2004]

Fox - No I believe he was talking about the 502ex he built.

[scuzz]

Originally posted by togup
Sorry ,you feel that way maybe it is wrong for his situation but I stole that from May 2008 ATV SPORT magazine break in tips for four strokes


I'm thinking you left out more of the caveats.

[TURBO-530R]

Originally posted by FoxHondaRider
so this 460 stroker build has 50.4HP and 39.1ft lbs?
NO SORRY MY LITTLE 502 DOES

Originally posted by TURBO-530R
NO SORRY MY LITTLE 502 DOES

any pictures? how reliable is it?

[Wheelie]

Originally posted by drew416ex
Im not trying to burst your bubble, but you may not be happy with the hotcam stage 2. I had it in my 440 stroker and it fell on its face up top. The stage 3 woke it up though :D . I dunno, you might like it like that. Either way, you will love the torque of the 460!

I agree, the stg 2 will not be enough cam for a 460.

[TURBO-530R]

Originally posted by Wheelie
I agree, the stg 2 will not be enough cam for a 460.

I will disagree i have a stage 2 in my 502 making 50.4 hp

[drew416ex]

Originally posted by TURBO-530R
I will disagree i have a stage 2 in my 502 making 50.4 hp

That may be, but how early does the power drop off in the power curve. With the stage 2, my power was comming on around 4000 rpm, but was falling off around 6500 rpm. When I put the stage 3 in, the curve started good around 5000, and doesnt fall off till close to 8000. My little 440 makes 46hp and stays at that for a while.

[kolby2004]

Got the quad fired up this weekend and rode for about 4 hours...all under half throttle with the stock carb on it. Soon I will change the oil...put the 450r carb on it and take it to the dyno. Here are some pics of my quad:

http://i179.photobucket.com/albums/w309/kolby2004/Quads003-1.jpg

http://i179.photobucket.com/albums/w309/kolby2004/Quads004-1.jpg

http://i179.photobucket.com/albums/w309/kolby2004/Quads006-1.jpg

http://i179.photobucket.com/albums/w309/kolby2004/Quads008.jpg

[hypersnyper6947]

Nice, it looks good, how did it ride and sound.

[kolby2004]

Thanks... Rode and sounded great, all though i didn't have much space to ride in this weekend, just a 2 acre yard. Also didnt open her up more than 1/2 throttle the whole time, and with the stock carb. So I dont really know what she can all do yet... But yes it sounds BAD @$$! and Great Low end power so it was still fun riding under half throttle! : )

i'm curious to see how reliable it is and how it runs full ride report because my friend keeps saying i should do it to mine, $600 and i will have a 460 stroker but he said i need a new clutch because stock cant handle it

[odog]

i glad some one else is doing a 460 kit mines will be together soon i sold my stage 2 hotcam and my stage 3 hotcam should be here tommorrow it will still be a little while before im able to ride because buying all the parts broke me. but let me know how yours turn out i have a 250r a banshee and a 700raptor and a few 400s i ll be riding with so i would like to know how yours does.

[odog]

did u get to open here up yet