Pictures of the cracked Wiseco Pro-lite from the flat tracker

[Billy Golightly]

Well I tore the motor down out of the flat tracker today and heres the piston out of it. Looks like it had some serious piston slap going on to cause this. It was also on its last bore of 69.50. So I'm leaving this cylinder it had on it off and sending an LRD ported cylinder down to Ronnie and having him hook me up with his special 265cc YZ piston concoction.

I don't get it though, the cylinder that was on this thing RIPPED, but when I pulled it apart there was barely anything at all done to it. If it ran as good as it did with just that little bit of work that LRD that had every single square inch gone over with the porting tool is going to be INSANE :eek:

[okiedragster]

i run pro lites in my drag bike for years and never had any problems which i run a 1260cc where most others rans 1340cc, but i had a coupla guys that did have some cracking on some big bore stuff. i kinda thought their problems was heat related though, but you can tell yours sure was doin some slappin, dunno never can tell your next build may work just fine...

[InPiEcEs]

Is that crack on the intake skirt of the piston?
That is where my original OEM piston cracked, too. Mind you, it had nearly 10 years of use on it, and couple of re-rings.How many hours were on your piston?
Must've had a pretty good death rattle to your R like I did,huh?
The LRD jug I think you you are gonna like.
My buddy had one done up for his FourTrax, and it was wild with their pipe.
Not sure what kind of porting he had done, but from midrange on,it was pretty wild.
I have heard, too, that even just cleaning up and smoothing out your stocker can make a reasonable difference, so that may be why that cylinder you had on ran so good.

[Billy Golightly]

yeah it was on the intake side. Hours on the piston, I dunno. Judging by the rest of the cylinder it sure didn't look like much but I find it hard to believe they would leave enough clearance in it to slap around like it did.

[Tyler]

Pistons crack, it happens. They sure do make a weird noise though, hard to describe ,but you know it when ya hear it. A simple clean up on a stock jug can make a noticeable difference depending how far off the original. LRD does good work, you will be happy with the results. Wiseco makes good pistons, but like everything in life they have a fatigue limit.

[InPiEcEs]

Mine measured clearance close to ".005, but also measured out of round about ".001.
So, if you add those up, it had close to ".006 on the intake, and exhaust sides.
Like I said, mine started getting what I call "The Death Rattle", which is piston slap.
Yours coulda been slappin' but not enough to hear, and with the 85-86 non-bridged intakes, they crack a little more often than the later bridged ones.

[hrc85250r]

well, that sure is a wierd piston, ive never seen them with all of those grooves where the rings are...none of mine look like that......that could be from not warming up the motor and hammering on it, wiseco's need to warm up a good minute or so before a pounding for them to expand to spec.

[ceaserthethird]

what piston you going with next ?

[X2guy]

The piston does show signs of cold seizing. See the scuff marks on the 2 corners. I'll bet there are similar scuffs on the other side. Wisecos are classic for this. Smoked my fresh 750 jetski this spring after about 2 hrs on it. Wiescos are good pistons but you have to baby them. I now use Pro X.

[Billy Golightly]

A 20 over 83-87 YZ250 Pro-X piston is what will be going back in it.

[jason 32]

i had the same thing happen with my kx420 piston- cylinder coating was gone
guess thats why piston companys give specific clearances huh,i ended up sleeving it

[Yamahondaman]

A 20 over 83-87 YZ250 Pro-X piston is what will be going back in it.
With some Extra Holes and "Boost" Port's !!!! :naughty:
F - T - C ..........ALL THE WAY !!!!!! :w00t:

[3leggeddog]

I don't get it though, the cylinder that was on this thing RIPPED, but when I pulled it apart there was barely anything at all done to it. If it ran as good as it did with just that little bit of work that LRD that had every single square inch gone over with the porting tool is going to be INSANE :eek:[/QUOTE]


i am amazed at how quick these r motors can be.with the right work,and a good tune,they will give you about all you can handle on a mx track,or in the woods.good little motors.let us know how that whole heyron orange farmer racing half breed thing works out for ya.i'm very interested in what the mad scientist comes up with.he knows his chit,no doubt

[Yamahondaman]

.let us know how that whole heyron orange farmer racing half breed thing works out for ya.i'm very interested in what the mad scientist comes up with.he knows his chit,no doubt
GIT IT RAGGGGGGGGGGGGG !!!
who Know's ...................................... maybe a Flat Track racer at TF07 ?
i might just take a ride up to North Fla. with a Truck Load of Stuff ?? :naughty:

[3leggeddog]

haha,you dude are nuts down there.i can't flat track,i get dizzy,and bored:cry: :cry: :crazy:

[wheelie king]

Flat traking is definitely NOT boring. Plenty of action for sure. Like pile ups and many "near misses"

Billy- too bad that you have to to a bore now. Go .40 over, baby!!!!:eek:

Ronnie- You gonn shorten and drop that Z for some flat track action?? Billy tried to talk me into transforming the 350X into a flat tracker....but I guess I do not have the gonads......or the bravery.....which is awfully close to stupidity sometimes....which at trikefest, for me at least, is enhanced by Michelob products!!!!:beer I need to get a "Brapp" deal on one of your bikes next year!!!

[SpeedBump]

I have seen guys running the Yam pistons in Honda 250Rs and some LT250s too. I think they have to move the ring pin to a little different position to miss the ports. It should run good. The ones around here do.

Oh ya, you guys know it doesn't take Brandon long to get dizzy...he is close in his "normal" state of mind! :w00t:

[ChrisD]

I mostly love to hare scramble through the woods, but I love flat track too.

If you're bored, you're not going fast enough. I love coming into a turn scared to death that I may not make it. 60 MPH into the turn is wild....doing it while undercutting someone in the turn is even better.

[Billy Golightly]

I just got word that the new owner of Thunderbowl speedway in Ocala is going to let trikes run down there now :w00t: SO, anyone with balls that clank enough to get out on the track will be able to race the entire Southern Flat Track League series. Ronnie and Greg you guys get your asses off the armchairs and at least come be the racers cheerleadin crew. Can ya say GIT IT RAGGGG!

[3leggeddog]

hmm,flat track is boring to me.going around in circles,no matter what rate of speed,is not exciting.probally the same reason why i dont like nascar.flat track is not my thing.a 30' step on table top,to a 20' stepoff,into a 15' double,while 5-10 guys are in front,or behind ya,now thats racin.when you throw in a few large double,a siick rythem section,and a 70' table top,you seperate the men from the boys.it's no longer about who has more money to buy more motor,it's about the skill of the rider,and how loud his brass balls clang.sorry no fun,or excitement in flat track for me.you guys tear it up though.i think it's a great sport for those who enjoy,it just doesn't do it for me.

[3leggeddog]

great news billy.tear that chit up man.good luck.

you lucky dogs pretty much race all year down there huh?dammit,stupid ohio winters.well,we got harescrambles to look forward to.how do you think the 500r with some 22" mudsharks will do in the sloppy mud,LOL.can you say...git it roostttttttttttttt

[Billy Golightly]

Yeah we do! You guys ought to come down for a race sometime during the winter if you want weather a break from the weather up there. Not saying it wont be cold down here (it has been known to get into the 20s and 30s where I'm at!) but there probably wont be any snow anywheres :)

[Yamahondaman]

HECK we had the AC on Last night !!! Shorts and "Dammit" T-Shirt on now ....
it's GREAT Here !!! :w00t:
Hey Billy ..... i can be one of your Cheerleaders right next to the Cooler !!!
Hey 3legg .... you can jump a 70' Table on a 3-wheeler ???

[3leggeddog]

Hey 3legg .... you can jump a 70' Table on a 3-wheeler ???[/QUOTE]


you know it.they say it's 75',but the gap is probally closer to 65'. middle of 5th gear gits-er-done

[Derrick Adams]

Hey 3legg .... you can jump a 70' Table on a 3-wheeler ???


That's standard fare at our local track. Actually the harder you hit it, the smoother it is. I know of at least 3 threewheelers that have cleared that tabletop.:naughty:

It's the 30ft uphill double that seperates the men. 30ft out and 40ft up!:drool:

[Yamahondaman]

i would LOVE to see it !!! 55' on a 4-wheeler is ALOT ... !!!!

[3leggeddog]

we wack 55'ers all day long at the fair races.nothing like a 4th gear wide open sweepin corner into a 55'-60 table top,yaahoo.good fun man.

don't know if you seen that nasty step up at haspin or not.i'm gonna square up on it a few times this year.see how it feels,get a feel for the corner,and maybe take a few wacks at it.the step up at our local track is bigger,but has more of a run at it.i will try to dig up some good pics form mike of the table top.

[Yamahondaman]

YES !!! i would LOVE to see a 3-wheeler doen a 70 Footer...
4-wheeler ................... no Problemo

[3leggeddog]

i looked through mikes photos,all the shots he has are kinda close up.he likes to focus on the rider,and not the enviroment.next season i am gonna have him take some distance shots to show the landscape more.alos i would like to get some "cool" pics over that table top.heres a decent pic. that shows some "little jump".the one where i'm between the 2 quads is the 70' table.like i said,more like a 60' gap.i was on derricks bike this race and finished 3rd in woodsmen class outta 7,not bad on a old worn out ohio ragggggggg



p.s.,sorry for jacking your thread billy.

[SpeedBump]

Check this d00d! Very outta control stuff going on upstairs!!! :w00t:

http://www.exriders.com/vbb/showthread.php?s=&threadid=230696&perpage=15&pagenumber=4

[3leggeddog]

i seen that before,that dudes siick.sure wish we could contact him or something.i'd like to chase him around the track a little.thats deffinitly big air.i guess we need to make it a point to go there next year and shred

[hrc85250r]

i still dont agree with the piston thing, i think either a- you just got a crap piston, or b-whoever bored it sut way to much clearance in the bore. wiseco's are superior in every way, you can argue with me all you want and say you have had good luck with them, but in a high performance motor i would never use a cast piston. forged pistons are lighter and MUCH stronger, they have grain flow throughout the piston similar to grain in wood. cast pistons are much heavier and are much weaker do to the molecular structure, they have no grain and are just a bunch of aluminum molecules randomly placed next to each other. all racer's use wseco's unless wiseco's arent available. especially in high compression-high rpm engines cast pistons crack often across the crown whereas wiseco's will hold up much better since the grain structure is spread across the crown evenly. if you read up on this you will find out that regardless of preferance you will admit that a wiseco is much stronger.

[ChrisD]

hrc85250r i still dont agree with the piston thing, i think either a- you just got a crap piston, or b-whoever bored it sut way to much clearance in the bore. wiseco's are superior in every way, you can argue with me all you want and say you have had good luck with them, but in a high performance motor i would never use a cast piston. forged pistons are lighter and MUCH stronger, they have grain flow throughout the piston similar to grain in wood. cast pistons are much heavier and are much weaker do to the molecular structure, they have no grain and are just a bunch of aluminum molecules randomly placed next to each other. all racer's use wseco's unless wiseco's arent available. especially in high compression-high rpm engines cast pistons crack often across the crown whereas wiseco's will hold up much better since the grain structure is spread across the crown evenly. if you read up on this you will find out that regardless of preferance you will admit that a wiseco is much stronger.

Sing it botha....I agree completely. I have cracked 2 Pro-X across the top of the dome, then gave up and went back to Wiseco. I have one in my bike for 8 years now and it keeps going.

[ChrisD]

i looked through mikes photos,all the shots he has are kinda close up.he likes to focus on the rider,and not the enviroment.next season i am gonna have him take some distance shots to show the landscape more.alos i would like to get some "cool" pics over that table top.heres a decent pic. that shows some "little jump".the one where i'm between the 2 quads is the 70' table.like i said,more like a 60' gap.i was on derricks bike this race and finished 3rd in woodsmen class outta 7,not bad on a old worn out ohio ragggggggg


Does anyone have video of you guys clearing 70 feet? That would be some awsome video.

[Billy Golightly]

I've had wisecos before and have always had problems with them seizing. Was it just because they weren't bored right? I dunno. But I've had very little to zero problems with casted pistons, so thats what I'm going with based on my personal experience and recommendation from Ronnie.

[3leggeddog]

Does anyone have video of you guys clearing 70 feet? That would be some awsome video.


everybody's too busy racin to get video.i think tim sr. was recording last race,but i was on the quad whille he was tapin.i'll be sure to get some pics.,and video next year

[maggiesboy]

With some Extra Holes and "Boost" Port's !!!! :naughty:
F - T - C ..........ALL THE WAY !!!!!! :w00t:


what does a guy need to pay for said services on a pro-x piston? :D

[ChrisD]

everybody's too busy racin to get video.i think tim sr. was recording last race,but i was on the quad whille he was tapin.i'll be sure to get some pics.,and video next year

That's too bad. Hopefully someone can get video sometime. I'd love to see someone on a 3 wheeler clear a 70 foot gap in the air. That would be pretty sick. How high do you have to go to clear that much ground. You must be at least 15-20 feet high. Most of the stuff I see and do myself is more like 15 feet but 70 feet is pretty far.

[Billy Golightly]

I've done about a 50ft table on my Z, not that much air height wise though. Probably 5 or 6 from the top lip of the take off.

[Yamahondaman]

what does a guy need to pay for said services on a pro-x piston? :D
do what did you said ??? ............... AND........................
as far as the Pics of a 3-wheeler doing a 70 footer........... WHERE THEY AT ???

[3leggeddog]

ron,go back a page and look at the pics.3rd one over.thats me on derricks bike,hittin the 70'er.they say it's 75',but the gap,is only 65'.still pretty scary.

and yes chris d,a 3 wheeler clearing a 70' table is siick.i gotta talk with mike about better angles of his pics.,he focus's alot on rider.i want some far away pics. to show scale,and landscape.

the table we just built at trikes house is approx. 60'. 4th gear wide open to clear that one.i'll be able to get pics. of that jump soon.alos i am working on building a jump at g-mas over the ravine.it's about a 35' gap,over a 20' drop.should be some sweet pics.


o,and billy,you know gailion has a flat track too.you could come up next summer for a whole weekend of racin.asphalt drags on fri,flat track sat.,and mx on sunday.:w00t: :welcome:

[Pete]

Wiseco fan here as well. But then again, Billy already knows this. :D

[Yamahondaman]

ron,go back a page and look at the pics.3rd one over.thats me on derricks bike,hittin the 70'er.they say it's 75',but the gap,is only 65'.still pretty scary.
:
Thats some neet pics !!! Dusty Track ... tell them to wet it down !! :beer