A forum for owners of Yamaha TTR250 trail and enduro bikes!

You'll read it here first when there is

Hope it won't be long before we are testing the first 2

Sorry for the delay, been learning to ride sand in the Algerian sahara on my 325
I have requested approx stock CR from Wossner. Still awaiting some sort of reply from them regarding the order Wish I lived in the States - for many reasons, but in this instance so I could deal with Wossner direct rather than being forced to deal with a UK agent who's not really interested! Another reason would be so I could play in the desert without looking over my shoulder for beards in Toyota pickups with rear mounted HMGs!!
Simon.

 Name and shame! Thats terrible customer service!

Could always call them out on Twitter etc.. Would probably speed them up 

Dan, out in Serbia now, got wet in his new "Adventure Boots." Complained on Facebook/Twitter to the manufacturer and they're sending some new ones out to him!

That's such a joke Simon! Hopefully JE Pistons save the day!

It'll be worth it when you see a fleet of ttr250s lifting those front wheels in 6th gear 😆

Is this the Holy Grail?

Pistons arrived from Wossner today (via TSR Performance). The story is Wossner moved factories in Jan and ended up with a huge backlog of work. Would have been nice to have been told that back in Feb, rather than treated like a mushroom, but there we are. I've now got 4 shiny 86mm pistons in my grubby mitts. Off to the machine shop to bore the sleeves and away we go.....

I'm wiping the drool off. Awesome. :)

Wow - the Holy Grail has been found!  

What great news to wake up to Simon.

You will have to warn those chickens that they will have to find a new home 

I'll get the barrels down to the machinist this week Steve, then send you one down so you can get the hole bored out properly.

Very nice!

Can't wait, so excited

Please make a video when you start the engine and do first ride

X 2
;)

Got my crankshaft rebuilt with one of Steve's conrod kits in the optimistic hope that it'll run Simon 

Another bit of TTR porn:

I hope to be taking my crankcases for machining tomorrow, I know Simon has also been crazy busy, so don't worry we will both be road testing very soon

What are you having done to the crankcase exactly?

Ok, ok, i should have guessed. Fingers crossed for successful tests. I for one can't wait!!

Ladies and Gentlemen, the world now contains 1 living breathing running Yamaha TT350R!!!!

After a few setbacks like delaminated inlet stub, and dropping a 48 jet into a black hole in my garage, tonight I took the plunge and gave it a go. Filter housing filled with oil, primed a bit on the kickstarter, got my brother to hold a camera, kicked the dogs out, twice, span her over without plug a bit, wound in a plug, 3 twists of the throttle and she went first go.

Yeeehaaa!

Hopefully we can get the footage into this thread, and if we do, I apologize in advance for the quality - just an old camera not an i-thing.

Twice round the field and the smoke cleared quickly (lots of oil in the bore from assembly). First impression: Oooh, this feels nice

There's a bit of pop on the overrun. Could be air leaking somewhere, could be mixture. I will be running with an air/fuel ratio (AFR) gauge, and dyno'ing when I've done some running in. It's too dark to play now.

Can't really believe it's finally happened!

Time for a beer. Cheers!

Simon.

Excellent new Simon!

Well earn't beer for sure, congrats!!

Here it is, youtubed by ex MrsTTR Trish, many thanks Trish - you may have found yourself a job

Footage of 5th gear wheelies coming later, when it's run in a bit

www.youtube.com/watch

That was genuinely the first spin. The smoke from the assembly oil was gone before the first lap of the field. I'm not showing much emotion - shock I think!

Fantastic achievement Simon. I have been quietly following and can't wait to hear your real world experience riding it. One day, I will rebuild my 1993 OE and this surely must be the way to go. Well done.

100 miles and no smoke or nasty bangs!

Currently running standard exhaust and airbox, twinair filter. 48/142 jets (needle standard position)
AFR meter indicating rich at idle (10 - 11) #46 pilot jet on order. Mid range richness (11 - 12) should be sortable by dropping the needle. WOT about right (12.5ish) Leaning it all out might actually not be desireable for tractability/"feel", but you never know 'till you try...
Makes you ride like a hooligan on the street, so that's a positive
Pics of the Lambda sensor and wide band AFR meter:

 

-- Edited by mossproof on Wednesday 22nd of August 2018 10:55:22 AM

In case anyone's wondering what I'm waffling about with air/fuel ratios, or why I'm not putting more miles on the 350 'till my #46 pilot jet arrives, here's some light reading on the subject, and as you can see from the pic above, 11.9:1 at tickover is a little low.

www.safrtool.com/SAFR-AFR-values.asp