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Discussion Starter #1
Okay so i think i have most of the parts for my 250/6 speed conversion, i got a ttr230 tranny, crank, and clutch, plus ordered my new cam form webcams and nethew valves and rockers,springs etc,so really im just looking for a place that will machine my tw output shaft and a piston w 16mm wrist pin and 74mm bore to get this put back together, anyone know of a piston or place to grind the groove in output shaft? Also womdering if i shouldget the head ported for a bigger carb, but the other stuff is more important. Any and all input is greatly appreciated
 

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Discussion Starter #4
Okay so the new crankshaft and 6 disk clutch from a 2012 ttr230 came in, new disks steels and hd springs orderded, new stainless valves w the 1mm oversize exhaust and moose cam chain, new xt250 piston rings pin circlips, w the 389 webcam cam and their racing spring set w titanium retainers, so next is to send the cam out to webcams, the head out to ct racing and the jug w new piston to la sleeve, and having worked as a cutter grinder machinist back in my younger days ,i put a call in to my friend and former employer Rodger at InTenths Grinding back east in Massachusettes and he said grinding the tw output shaft to match the groove should be no problem, sending him pictures before he gives me the final okay, but theres ,hope!
 

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Discussion Starter #5
Okay im way too into this project, but just ordered an xt225 stainless pipe off ebay and the Clarke 4.1 gal xt225 gas tank, this should extend the range of the bigger engine , with a 74mm bore and the 62mm stroke of the ttr230 crank i should be at 267cc i think
 

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Discussion Starter #6
Just an update on the Wagon, In Tenths Grinding in Massachusettes has my output shafts and will be grinding the circlip groove in the tw one, CT racing has my crank shaft out of a ttr230 for rebuild. And they will recieve my head,valves q 1mm oversized exhaust, rockers etc, and webcams is using my original cam for the new 389 grind then sending it to CT for assembly, CT will do the 5angle valve job expand the exhaust port, new guides, with honeycomb race springs and titanium keepers, Moose racing hd timing chain and Monster coils hot coil both came in along with the ebay ttr225 head pipe and clarke xt225 4.1 gal gas tank, still waiting for my new piston and rings to get here so i can send them w the jug to be bored and resleeved, and bore out the case for the new jug to fit, but overall it coming together quickly, next update hopefully will be about reassembly lol
 

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Glad to hear you weren't forgetting to open the case mouth for what I assume is an XT or TTR cylinder. People have done this relatively low precision work with hand tools, a few without even splitting the cases.
Your bike should be just about as good as imaginable once done.
 

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Discussion Starter #8
Im using the stock tw jug, but resleeved, it will be bored out to accept the bigger sleeve, Alan at CT racing has been super helpful with this, he suggested going to 76mm with the sleeve, and i agreed so custom piston is being made up, with 76mm bore, 16mm wristpin,that gives 10.5 to 1 compression.
Right now where im at with it, is im waiting for the output shaft back from the machine shop, the crank was rebuult by CT Racing and is on its way back to me, they are porting, polishing,installing the 389 webcams shaft and race springs,with new rockers ,guides, etc, ,they also currently have the jug and will bore and resleeve it for the custom piston. Got my clarke xt225 4.1 gal tank but it needs to be mounted ,going to weld the tabs that come with it to the frame for proper side plastics fit, also changing out the led blinkers for a dual color set that are white/amber up front and amber/red in the back, ordering the last 4 xase berings today or tomorrow, then the engine gasket kit, extra circlip i will need for the tranny and its just a matter of waiting until the neq cylinder comes back to bore the case, which will be done with precision on a bridgeport style machine.
Im stoked up about the 76mm bore size because with the stroker crank it will displace a hair under 304cc's, wow! The t dub 300 that Yamaha shouldve built haha,
Also scrambling to get this done before the TW ride in the desert on the 23rd and before my 50th birthday on the 26th , its crunch time
 

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Discussion Starter #14
Yes to all, I am practically foaming at the mouth to get this done for the Mojave ride, today I got a handle bar pad and some decals for it. The tank decals read FTW for faster turtle wagon and got 304 numbers for the side panels.

As far as carburation I will attempt to use the stock carb, only with a much larger main jet ,and maybe 2 needle shims to start, it will take some tuning for sure, the case berings are all ordered and on the way , however, the clutch rebuild kit I got from Outlaw racing came yesterday and the disks are too large diameter and same with the springs. I have a ttr230 clutch that's going in the bike so I ordered for that clutch, sending that back. Was the mistake on their part? Or do I need to order a certain year ttr230, cant afford the time to get wrong parts ,
Lastly just hoping that the output shaft, crank head and jug all get back to me before the week is over or early next week to begin assembly
 

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I used the stock carburetor with my 225 build but it did not work with my 250 build. The motor didn’t have any top end. I couldn’t go 50 mph with a 47 tooth sprocket. There’s not enough room between the motor and the frame to run a large carburetor that will have the airflow that you need. Do you have any carburetor options?

ronnydog
 

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Im using the stock tw jug, but resleeved, it will be bored out to accept the bigger sleeve, Alan at CT racing has been super helpful with this, he suggested going to 76mm with the sleeve, and i agreed so custom piston is being made up, with 76mm bore, 16mm wristpin,that gives 10.5 to 1 compression.
Right now where im at with it, is im waiting for the output shaft back from the machine shop, the crank was rebuult by CT Racing and is on its way back to me, they are porting, polishing,installing the 389 webcams shaft and race springs,with new rockers ,guides, etc, ,they also currently have the jug and will bore and resleeve it for the custom piston. Got my clarke xt225 4.1 gal tank but it needs to be mounted ,going to weld the tabs that come with it to the frame for proper side plastics fit, also changing out the led blinkers for a dual color set that are white/amber up front and amber/red in the back, ordering the last 4 xase berings today or tomorrow, then the engine gasket kit, extra circlip i will need for the tranny and its just a matter of waiting until the neq cylinder comes back to bore the case, which will be done with precision on a bridgeport style machine.
Im stoked up about the 76mm bore size because with the stroker crank it will displace a hair under 304cc's, wow! The t dub 300 that Yamaha shouldve built haha,
Also scrambling to get this done before the TW ride in the desert on the 23rd and before my 50th birthday on the 26th , its crunch time

I believe your cc calculation is 281.26 ccs with a 76mm piston and a 62mm crank. .?

Ronnydog
 

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Discussion Starter #17
Ronnydog, thank you for that info, if the stock carb will not flow enough, even doing vacuum slide mods, jetting and shimming, then that will be an issue for sure,I think Mikuni makes a carb that will fit ,if not then im not sure, but yes i think your right at 281cc ,just got the stroke wrong, haha
 

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Discussion Starter #18
Ordered the 280 stickers today, and from what i have read, the stock tk carb is capable of flowing 100cfm, so with the proper tuning should feed the 280 just fine, but as Ronny said he had power drop off at high rpms, but for now the plan is to rebuild and rejet the stock tk carb and see how it goes
 

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TTW280... Tee-Tee-Dubya Too-Eightee has a nice ring to it, but do you think those 1.26cc's are going to get jealous?
 

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Discussion Starter #20
I got FTW decals for the tank ,Faster Turtle Wagon and i thought about getting 282 stickers but thought the 280 looked better, so for a quick update, the head will be back in this week, crossing my fingers for the jug and piston too, we will see,
In the meantime i worked on my side project for the new tank, i got metal 3d skull and crossbones for each side of the tank, i then got 2 sets of 5mm red led that come with a mini controller and 9v battery connectors, tonight i snipped off the 9v battery connectors and ran leads to 2 12v to 9v step down transformer /regulators so i could run the 9v leds off the bikes battery, next is to grind a slot in the back of the skulls and affix the red leds into the eye sockets before i mount them to the sides of the tank, wire em to the battery and mount the controllers into the foam of my handlebar pad,
I also have some of those led strips made to go on your hemet ,they are a 3volt reference to i ordered step down transformers to see if i can wire those to the battery directly as well, might have to call it the Tron Wagon when im done hahaha
 
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