tri z rod change//long rod???

[HEAD09]

well since my sounds like a 1920 sewing machine i like to get done soon...so i need the info to do this... what the best rod to get and how hard is to do!!!!should the crank pin be change also can you get them in a kit....is there a long rod out therer?? does anyone have it there trike........yz any different....thx

[03 ORANGE SHEE]

you can get a hot rod for $90, there should be a new pin in the kit, as it gets pressed on/off. most shops here charge $50 for the install.
long rod.. yz490 rod, but good luck finding the 1/8 spacer plate for it. i know where there are two new spare spacers are, but dont think he will sell them.

[honda250sx]

Is it forsure a 1/8 plate? These would be as simple as sliced bread to make on a waterjet. Make an 1/8 longer dowels for it and bolt it up. Seems to me that'd be fairly easy to recreate.

[dmotoxrider]

If i wasn't on deployment i could measure my spacer but i believe ronnie said you have to use a 1/4" thick spacer. You would use the 490 rod with the tri-z bearing and thrust washers. He also gave me longer dowels and told me to turn the studs out 2 turns or so. There was a bottom end on ebay a while back that had the long rod installed with a spacer plate. I don't know who snagged it though. later
chris

[honda250sx]

So is it 1/8th or 1/4 inch?

[03 ORANGE SHEE]

it might be a 1/4,minus the thicknesss of the extra bass gasket i cant remember.:crazy:
its close to that number, calipers tell the real story.
ever hear a 490 rev? it revs like a tractor, all torque, not quite the peak rpm of the z

[honda250sx]

Maybe Ronnie can chime in. It maybe time to fire up the waterjet at work...

[HEAD09]

thx for the info....

[Yamahondaman]

1/4" ... i have the print for the plate with all of the PERFECT dimensions...
PM me your addy and i'll send it to you so you can do the waterjet Gimmick
Ronnie

[honda250sx]

PM sent good brothren of the metal working mafia!

[honda250sx]

Hey Ronnie, Lookie what I gots my hands on today. Customer donated these pieces of .250" 6061 ALUMINUM... Spacer plates here we come!
http://i71.photobucket.com/albums/i151/brauerpower/DSCN3643.jpg

[tecat-z]

Curious to find out the progress of these plates? Haven't heard anything in quite some time, and i need to send some stuff to crankworks........:naughty:

[Bryan Raffa]

ya jeff whats up witdat? I got a extra crank layin here also that I might Do somethin with if I had the plate..I will build one:naughty:

[Dirtcrasher]

^ He's been away for work for awhile, not sure if he's back yet......

[honda250sx]

Hello from the dead this thread comes to life.

Cutting some of these this afternoon hopefully. Just got the freaking program done.

http://i71.photobucket.com/albums/i151/brauerpower/cylinder_spacer.jpg

[Yamahondaman]

HA HA HA ........... COOL !!! might be just in time for the Super Motor i'm Building for deepa ! :naughty:

[tri-Z ripper]

Lucky Deepa! cant wait to get to ride that super motor! keep an eye ronnie ill be putting those goodies i got from you two years ago! on a Z soon!
Also Honda250SX glad to see you doing stuff for tri-z again! woot Yamahondaman

[tecat-z]

Jeff..... Don't forgit to holler at me.:naughty:

[honda250sx]

Jeff..... Don't forgit to holler at me.:naughty:

I'll be holllllarrrrring soon Ed.

Anywho... Cut the first one out for mock up today. I'll dig cases out and match up this weekend. If all is good I got alot of material to cut!!!

http://i71.photobucket.com/albums/i151/brauerpower/spacer2.jpg

http://i71.photobucket.com/albums/i151/brauerpower/spacer1.jpg

[Yamahondaman]

HUMMMMM ..Very COOL !! Jeff your Box is going out Thurs.,i had no Acorn Nut's left so i'm turning them Today..i'll try and GIT some pic's of the bottom of the Rod Versus the case soon !!

[Bryan Raffa]

let me know.. I would like one.. Im haveing a new rod installed on the 490 might as well Order Two rods

[Yamahondaman]

HUMMMM ... Them Sucker's are EXPENSIVE !! they go for 160.00 , but i got em for 120.00 each.. then it took 1 day to make the fixture and mill off the bottom for the TRI-Z Cases ... Dang MAD SCIENCE GO FAST Different Mess !! :-)

[Bryan Raffa]

cost money to GO FAST!

[honda250sx]

Got the proto-type finished up. CAME OUT GREAT! No mod's needed. I will be ready to cut these within a week or so, thats when I will have the time.

Price will be $35 a piece shipped. This includes the longer dowels needed to accomodate the spacer plate. Longer studs are NOT needed. Just turn existing ones out a few turns as they are plenty long.

Paypal accepted from verified members - Chompers0000@aol.com

http://i71.photobucket.com/albums/i151/brauerpower/DSCN3933.jpg

http://i71.photobucket.com/albums/i151/brauerpower/DSCN3932.jpg

http://i71.photobucket.com/albums/i151/brauerpower/DSCN3931.jpg

http://i71.photobucket.com/albums/i151/brauerpower/DSCN3935.jpg

[Dirtcrasher]

WOW!! That looks awesome...............

Nice work to all involved, coughing up the $$ is NOTHING in comparison to the research and finished product :beer:

[Bryan Raffa]

great Job! lets just hope the spec's are right .. and we dont have to deck the cylinder who's gonna be the First?....:naughty:

[MOTOMAX27]

does it take any gasket??

[honda250sx]

Yes it will require two gaskets.

Ronnie can chime in on specifics. I just made them.

[dansvan]

What will be the benifits of this? More low rpm torque?

[DeePa]

i have a felling i will be the first...made by some crazy old get it rag bat in fla...

[Yamahondaman]

The Rod Diff. is .295 ... with the .250 Plate and Two Gasket's comes out to .296 ... Perfect Deck Height.. i just need to figure out Squish and Dome Volume... The "Old Bat" will GIT IT done soon :-)

[tri-Z ripper]

Sounds like a tourque monster! I have ridden my friends banshee with a long rod such a long rev! and when it hits powerband the tires usually squish together like a hot rod! sounds like an indy car and has a supriseingly quite idle! Can't wait to see what the mad scientist has cooked up for you Deepa!

[volfan537240]

so you just use a yz490 connecting rod? how does that make more power? im confused. i have a longrod stroker crank in my banshee but the longer rod only decreases the rod angle and puts less side load on the piston and sleeve.

[nstyle73]

I know this thread has long been dead, but who ended up running these, what were the results and are they still available? I am looking at a Z that needs the crank rebuilt and thought I might as well go for it if these had been tried. Probably going to run a Sprock 310 kit with it as well.

[Mosh]

I know this thread has long been dead, but who ended up running these, what were the results and are they still available? I am looking at a Z that needs the crank rebuilt and thought I might as well go for it if these had been tried. Probably going to run a Sprock 310 kit with it as well.While I have no experience with running the long rod set-up I just want to alert you that if your run the Sprock BB jug, that he has decked nearly .100" off the jug both top and bottom to run that BB sleeve and piston. So whatever the rod difference is, you will have to factor that in to the spacer plate thickness as your deck height is significantly different with Sprocks jugs versus stock..If memory serves correct, he took around ..050 off the bottom and .030 off the top.

[Blizzard420]

Hmmm I too am also curious on this endevor, If someone can chime in as to whats involved with the whole build. As this thread kinda seems to dive off into nowhere, 490 rod and spacer plate? I saw squish and dome volume mentioned but trails off shortly after.

[zmpolaristech]

yz490 rod, .250 spacer plate, and 2 base gaskets = long rod motor...But, as Ronnie stated earlier in this thread, APPARENTLY the rod won't clear the cases...so, a slight trenching should do the trick. And yes, the only real benefit of the long rod is less side load on the piston (due to less rod angle), as Volfan stated. However, less rod angle does equate to faster revs... It also increases crankcase volume, due to the spacer plate, but I don't believe MORE crankcase volume is necesarily a good thing.

[nstyle73]

Dang Sprock :-), well that sounds like a very custom piece of spacer. Probably not worth the effort for what I"m going to do. A spacer sold on Ebay a while back for $40 so I didn't know if these were being made or they had it lying around. I didn't fork out the cash as I didn't have a Z.

[Bryan Raffa]

got all my stuff still layin around... everything ready to go...:naughty: cant decide on what color.......:rolleyes:

[El Camexican]

got all my stuff still layin around... everything ready to go...:naughty: cant decide on what color.......:rolleyes:

Bead blasted? Sweet!!!! :drool: Leave it like that, nothing screams race engine like bare aluminum cases.

[Jcormode]

While I have no experience with running the long rod set-up I just want to alert you that if your run the Sprock BB jug, that he has decked nearly .100" off the jug both top and bottom to run that BB sleeve and piston. So whatever the rod difference is, you will have to factor that in to the spacer plate thickness as your deck height is significantly different with Sprocks jugs versus stock..If memory serves correct, he took around ..050 off the bottom and .030 off the top.
so would an extra base/head gasket make up the extra .080 do you think? hey raff that looks like you've got my engine on your bench ha every engine should be blasted!

[Mosh]

so would an extra base/head gasket make up the extra .080 do you think?
No. You have no option with the head gasket on a Sprock BB, as the BB kit would be sealed by O rings with a coolhead. You would have to cut the spacer plate way thicker than a stock 250 jug. Which IMO would be the way to go, as the Z has sealing issues with paper gaskets at the jug already anyway, and doubling them could yield air leaks.