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Post Info TOPIC: 350cc Big Bore Kit for the TTR250 - updates and gossip!


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RE: 350cc Big Bore Kit for the TTR250 - updates and gossip!
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Just over a week to go until my 350 starts its first race.

Liam has a lot of confidence when riding this bike since playing with the suspension a little, and adjusting the ergonomics. We both find the bike much better to ride with my steg pegs on-even though it makes air filter access more time consuming. But we are running with the theory that he'll be riding the bike for 24 hours, but may not have to change an air filter... So stegs will have greater gain. Due to the nature of the race, we also changed the gearing from 14:44 to 13:44, but it'll still do 120kph.

The motor itself has just over 30 hours of use, and remains extremely smooth and torquey, so we have no concerns there.

 

20210617_085023.jpg

20210617_085047.jpg

We have a little more testing to do with another light, but are pretty happy with the set up. Other than that-fresh oil and tyres to be be fitted early next week... once the Hattah Desert Race is over.

With a bit of luck, Covid restrictions won't impact our ability to get there (several riders have been denied entry to the state due to border closures. If the current regulations continue as-is, Liam may be the only interstate competitor)



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Good luck with the 24hr, it gets bloody cold out there overnight so get him to have layers that can be removed as he warms up. Make sure you use DOT tyres & the lights are up to the task.

Phil from Motorbiking is riding a TT250R this year so we should have at least 2 x TTR's out there proving he can get into SA from Queensland !!!!

Cheers Terry

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I rode the 24 in 2006 on a TTR 250- finished with a class win... The only difference with this bike is using LED lights instead of halogen. My bike has just come through a roadworthy, so we know that it's right to go. Motoz Tractionators this year.

Unfortunately I have heard that Phil has fallen victim to the Covid lock downs and will be unable to make it.

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Scrutineered and ready to go.

20210709_153215.jpg



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Good luck Liam!

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Looking like a winner already!  Good luck boys wink



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Hope you smash it win that is !



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My mate ( he also has a TTR) rang me last night to see if I wanted to come up, he's on one of the check points, I told him to keep a look out for the TTR350

Good luck & keep warm

Terry

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Thanks for the messages guys, they have been passed on to Liam. I almost forgot they have live timing this year

my.raceresult.com/171719/Live

There is 15 riders in Liams class (F), most on excf 350's.

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Good luck! Go smash those Ktms! Haha

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Thanks

Daniel Lee



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After 12 hours of racing, Liam withdrew from the event.

1/3 the way through his second lap he was looking pretty good, despite having been thrown a few times (largely from last minute changes to the front end that we had to make due to a cracked front rim... Complete front end change) . Coming in from his second lap (at 1 am) we could tell that he was done. As he put it "racing Hattah last week wasn't a good idea" (4 hour desert Sprint on 38km track). Fighting with the different front end on a rapidly deteriorating track just exacerbated everything that he'd felt since the previous race.

On the up side, the 350 ran beautifully for pretty much 12 hours solid, and we had full confidence that it would easily make it to the end.



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Bad luck but it is a ball breaker event

 

Cheers Terry



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Well done Liam - and the 350 motor! 12 hours racing was probably the best test yet and Steve probably ought to add it to the sales blurb wink



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Well done Liam for getting that far! Amazing test of man and machine and glad both came out unscathed smilesmile

Good news for the 350 owners out there.



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Better to stop voluntarily than be stopped by an exhaustion induced crash! Damn good effort even making the start after Hattah. Well done and I'm glad the 350 didn't let you down

Incidentally, batch of six barrels came back from the foundry today. This may be the last batch as demand slows and the outlay weighs heavy on my bank account...

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On the drive home, Liam was going through his footage, and has put a Youtube video together. (There is a little bit of swearing in the video)

In watching the footage, it's worth noting that prior to starting, the bike had been locked in Park Ferme for 22 hours- and wasn't permitted to be started until his departure time... Firing up for the second lap is at 14 minutes (give or take). I am very happy with the way the 350 started and ran throughout the event.

At the time of withdrawing, he was coming 72nd of 146, and 7th in class...

www.youtube.com/watch

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Well done to both man and machine, that was a top effort mate! Great footage too.



-- Edited by Dlight10 on Tuesday 13th of July 2021 06:34:31 PM



-- Edited by Dlight10 on Tuesday 13th of July 2021 06:48:58 PM

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Great video, love the video split between day & night, lights were pretty good as well. No shame in pulling out I know plenty of guys that have taken a few years to finish the event, they learn the mistakes with what to carry & wear. But at least it was dry this year, in other years it has been very wet & would be the worst weekend during the year weather wise.

The bike seemed good with plenty of sandy loam, got to watch water holes & stick to the left, sidecars dig huge holes on the right.

Cheers Terry

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 YOUTUBE channel https://www.youtube.com/channel/UCPSstOEnd2NSu0Va6kt2ySg



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mossproof wrote:

Better to stop voluntarily than be stopped by an exhaustion induced crash! Damn good effort even making the start after Hattah. Well done and I'm glad the 350 didn't let you down

Incidentally, batch of six barrels came back from the foundry today. This may be the last batch as demand slows and the outlay weighs heavy on my bank account...


 Mossproof/Steve put me down for a kit please. I was going to put it in my TTR263 but that bike goes too well. So I am building another one to replace my Wrf. Twin TTR'S!!



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Going for a PWK again on this one? Should fairly easily hit 40hp.

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Gadget964 wrote:

Going for a PWK again on this one? Should fairly easily hit 40hp.


 Yeah PWK38.  Scotty already has a new one ready for me!  I dunno about 40 hp  aim to crack 30+.   With just some head porting and with trick exhaust and suspension.  The 263cc bike is actually my sons bike I comandeered!  Time to build my own.



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Yeah, 30.


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Don't blow the bottom end !!!! 30's a good enough target.
Latest batch are at the machine shop next week, but Wossner are being coy at the moment...

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mossproof wrote:

Don't blow the bottom end !!!! 30's a good enough target.
Latest batch are at the machine shop next week, but Wossner are being coy at the moment...


 Ha ha no it will remain pretty stock just bigger carb massaged head and better exhaust. Might play with different headers.  No hot cams or anything.  And no hurry from this end its all got to be build from a pile of parts that all need to be reconditioned and reassembled, motor rebuilt etc. As long as one has my name on it!!



-- Edited by Kaos on Monday 19th of July 2021 11:36:58 PM

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mossproof wrote:

Better to stop voluntarily than be stopped by an exhaustion induced crash! Damn good effort even making the start after Hattah. Well done and I'm glad the 350 didn't let you down

Incidentally, batch of six barrels came back from the foundry today. This may be the last batch as demand slows and the outlay weighs heavy on my bank account...


 Hi, Reference demand is low:

Apart from the forum, have you actually got much social media advertising out there? I find it hard to believe that the demand would be low! 



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Actually small batches are hard enough to get produced and I find it quite stressful on behalf of the buyers - lead time is up to 8 months and at the mercy of foundry, machinist and Wossner/EU customs.
It's also a big outlay for what is an old style bike and requires commitment - financially and spiritually! Far more people talk about fitting one than come up with the money, and my (limited) knowledge of social media suggests there would be a lot of hot air blowing in totallyttrs' direction with idle enquiries. If they've found this forum then at least that shows a bit more gumption than just clicking on a hashtag, firing off a "how much, what do I have to do to my bike, do you fit the kits for me..." type stuff. The harder the path, the greater the reward grasshopper


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Mikes Kit is being sent in the morning, grasshopper made me laugh and shows your age Simon !

Only 2 kits left now wink



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ttr steve wrote:

Mikes Kit is being sent in the morning, grasshopper made me laugh and shows your age Simon !

Only 2 kits left now wink


 GGLLAAASSSS hopper , hey thats not old !!!!

 

 



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mossproof wrote:

Actually small batches are hard enough to get produced and I find it quite stressful on behalf of the buyers - lead time is up to 8 months and at the mercy of foundry, machinist and Wossner/EU customs.
It's also a big outlay for what is an old style bike and requires commitment - financially and spiritually! Far more people talk about fitting one than come up with the money, and my (limited) knowledge of social media suggests there would be a lot of hot air blowing in totallyttrs' direction with idle enquiries. If they've found this forum then at least that shows a bit more gumption than just clicking on a hashtag, firing off a "how much, what do I have to do to my bike, do you fit the kits for me..." type stuff. The harder the path, the greater the reward grasshopper


 Makes sense, anyway thanks for all you hard work. I have had at least 50 bikes (most dirt biased) I have gone full circle back to the some what older design as it just works better as a less maintenance, less tiring ride! 

It just lacks that little bit of extra grunt to keep up with the fellas on there modern bikes. Hence the 350!!! that should see me right.

The new Hagon development shock and the KYB forks should sort out the rest of my niggles..............

I will keep you all posted on my progress and testing etc.

 

Thanks again for all of your hard work and dedication.

 

 



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Advise welcome please:
I now have a spare set of cases in my mits to get machined now. 4GY00
They are slightly different to mine 4GY02........... (blue) there also this where on mine its blanked off. I am presuming that will be the only difference and I will not come across any differences that might affect me once i am ready to swap over the insides.

 

 CASE.jpg



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As far as I am aware that (crank breather) is the only difference. If you can wangle in another centrifugal breather filter somewhere and introduce it to the air filter box somehow, I'm sure it would help the crankcase breathing - 100cc extra going in and out with every stroke of the piston is a lot for the standard pipework!

If you choose to block off one or other, be aware that there is more oil mist coming from the crank cases than the head/cam gallery - the breather drain pipe gets more oil in it on the oe/raid 350s than the blues.

I have yet to find a system that can separate the oil mist and return it to the crank case rather than blowing it out as waste. There must be something out there? But then, sometimes there is an emulsion when running in humid conditions, so you don't want that returning to the sump... Nothing is ever simple is it?

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why not vent it to atmospere up the frame & to the back like they did on a lot of british bikes

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Thanks for the advise, it well may be a blessing then? I will keep the head vent as is and then add the case vent into the build somehow.

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JOHNYBOY wrote:

why not vent it to atmospere up the frame & to the back like they did on a lot of british bikes


 

Well the breather sucks as well as blows - every time the piston goes up and down, so you risk drawing dust/water into the crankcases, quite apart from the oily mess that will build up (not a problem with old British bikes, which were an oily mess from the factory



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Finally came across an official manufacturers break-in procedure from Wossner:

cdn.shopify.com/s/files/1/2030/3551/files/WTB.00003-B_POWERSPORTS_BREAK_IN_INSTRUCTIONS_06-23-2021.pdf

If that link doesn't work go to www.wossnerpistons.com/pages/faq-and-helpful-forms

Quite a handy page! Ryan F9 on the 'tube is also a handy resource:

www.youtube.com/watch


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Hi all,
It's been a while, so I thought that I'd give an update on the TTR350 (TT retro look).

This motor continues to run exceptionally strong. Starts easily, and never misses a beat. Since running in the 24 Hour Reliability Trial, all that I've had to do to it is change engine oil and swap air filters. The Mikuni TM33 hasn't been touched since the dyno runs... Summer or winter, it just starts and runs well.

Now that I am not using it in the desert much, I've changed back to my TTR250 forks with gold valves (TTR600 forks changed the rake too much for the hills.) The bike has recently been changed to historical registration, which is for vehicles over 25 years old. It continues to draw a lot of attention wherever it goes......

While setting up his own bikes for other events, Liam decided to use the 350 at a round of the Diamond Valley MCC enduros at the Sanders Apples property near the Yarra Valley (Home of Daniel "Chucky" Sanders). It was the only bike that demanded any attention. Both fork seals blew (18 years old- so they were way past due), the headlight bolts came undone, leading to the headlight falling off (which he picked up and carried back to the pits on the following lap), and the headstem came loose and needed to be secured. Despite this, Liam brought the old girl home in 55th (of 74). Hopefully he will have a video of the event set up soon.

278653497_4977887292288872_1963044493238989248_n.jpg

 

278716979_1304697599940003_3893399005677224380_n.jpg

278731470_525647975880723_7068239991060485946_n.jpg



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Thanks for the update. Good to hear things are running well (including the carb mod).
I don't think I'm a sensitive (or fast) enough rider to feel the benefit of gold valving the forks, but as I've more or less run out of other things I want to modify, I suppose I should try!
Cheers,
Simon.

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Turns out that the 350 is getting raced again tomorrow. It'll be an enduro sprint round this time (near Tallarook, Victoria, Australia).

After blowing the forks last week (and having no time to get them serviced), we were going to fit the WR200 front end on, but the WR front wheel needs a few spokes..... So we "borrowed" a set of forks off my mates TTR.

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Hi!

What is the highest mileage 350 out there?

I am going to build an engine soon and the 350 is tempting, but worried about long term reliability...

Thx

R.

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Mine has still only done about 2500km..... but over half of that has been under race conditions. For those new to these pages, I fitted the 350 kit to a 1996 TTR250 (what you guys call an OE), then added TT350 tank and race plates.

The following links are from my sons vlog thingy. There's a bit of talking, but also some raw footage to see the 350 in action.

www.youtube.com/watch
www.youtube.com/watch




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