DT125R FORUM

Just that folks - a 90/90 isn't too wide for this is it? Cheers!

I've been digging through the info here and elsewhere on the web but I can't find out - I have a French import 92 DTR with the original 3mb expansion chamber. Bike is currently around 14-15 bhp.

I've read that these chambers of this era often have a cone shaped restrictor on the engine end of the pipe on the sub 15bhp models, and once removed they run up to around 18 bhp.

I take it there's a jetting change needed to compensate, and I'm wondering if there's a ball-park figure to start at for an otherwise standard French 92 model?

Cheers me dears!

Shaun/FloWolF

@HOTSHOT-III Cheers buddy yes that's the thing - the box is in good nick, I just ripped the lock tab off. I could try and make something up, but it'd be a shame as the bike's currently all original/unrestored.

Thanks again!

Shaun.

I've broken the lock over tab on my little OE on-bike toolbox rubber lid/cover, and I can't seem to find if anyone does replacements for them.

Anyone know what I'm on about and have a clue if by any remote chance, anyone has replacements available?

Cheers me dears!

Shaun/FloWolF

@SpookDog So what was the upshot of the diesel mistake then?..

@SpookDog I've been the oldest person by a margin for every CBT I've done since the first one at the end of the 1990's, luckily not as old as the instructors though!

My instructors may be gladdened to hear I don't overly utilise my mirrors out of consideration for the health of my nerves. Heh! Only joking before anyone gets upset

Cheers! P.s. I'm thinking of sewing some webbing straps to the ankles of my MC pants to help with getting on and off!

Shaun/FloWolF

@Stevie-Wonder Thanks for that, appreciated.

I'm actually still without a diagnosis, but it's been pretty obvious for a long time.

And I'm not afraid of the bike at all, it's a different set of a different kind of fears and once I get past those I'm back to myself, who learns by osmosis and has a natural practical sense.

I fell in love with 2 strokes when I was younger, but I never had the money to do it well then, so just rode beaters around the fields, but they're in my blood and I follow a lot of the 2 stroke fb pages, try to keep up with any news, even read the tuner's handbook for fun a couple or so years ago. I'm not about to willingly trade my way out of owning this one. I'll get my head around everything soon enough.

Thanks again!

@SpookDog

Sitting on a tall bike with an upright riding stance almost exactly increases apparent speed by 33.33(recurring)%!

Mine's a French import, 'unrestricted' with fully working PV. Don't know what that means in actual RW BHP though, but it seems to be enough for me.

I hadn't noticed unusual wind noise but then again, my last helmet was the earlier Duke, and I tend to ride everywhere with my visor open at least an inch anyway so I always get tons of wind noise

@Calum That's what I reckon mine would have done standard gearing, but fastest I got was 67.

The 18 tooth ONLY just fits, and you have to remove the rubber chain-bumper/whatever piece from the casing in front of where the sprocket sits, for it to fit in there.

I've not a clue what top speed it could now manage with the power it has, but I'm sure it'll be fast enough for me with a little room to spare.

@HOTSHOT-III

Over-sharing seems to come with the spectrum territory heheheh!

Carb strip done, all back together and running like a dream!

My one main cockup, I bent the last few mm end of the f'n slide needle didn't I! Never bent, broke or lost one before, but luckily I got it back right and it works perfectly again.

It's always the demons and the walls they build that present me with the biggest obstacles to overcome, except for where money is the issue heheheh!

Cheers, and thanks.

@SpookDog

Oh buddy, I feel ya - my back issues are similar, from shooting pains down through my arse and down my legs, to a feeling like my balls are being squeezed in a vise, and it's been effecting me for abgout the last 20 years too, and is all because of an MC accident winter of 1999 where I shattered (centre 3 inches of it 'turned to crumbs' to quote my surgeon) my left femur (now pinned from hip to knee) and whiplashed the hell out of my neck and lower back.

I got back on the road with the Piaggio scoot about 2010, and that took some guts, I was fucking terrified.

I'm just short of 5'11'', but I have to climb on with her on the sidestand and sometimes have to use a hand on a leg and pull it to get off, it's hilarious.

Thing is when the planets align I can have moments of athletic limberness that has too many people fooled.

I quit drinking for the last time 9+ years ago now, I was in a very dark place for years before that so hopelessly depressed and I was drinking all the while my eyes were open.

I have a soon-to-be 8 year old Au/ADHD kid (just been to his mental-monkey warehouse birthday party heheheh!), and plenty to live for so although I am still AFU in many ways, I don't tend to get properly 'depressed', but I tell you what that lad kicks my arse, I'm AuDHD but I can't keep up with him on his slowest days.

As for the bike, I was very happy with it when I put it away yesterday after the 18 tooth sprocket and clean carb test ride, and I'm not suffering too badly from the last few days efforts.

Cheers bud

Shaun/FloWolF

@Calum I'm far from alone with what I'm going through, and there's always people having a tougher time and doing better with it, so wtf eh heheheh!

As for the bike, well it came from Glenn, hasn't done much mileage and far as I can tell, is otherwise more-or-less in top, unrestored, original condition.

Anyway, all the work is done now, 18 tooth on the front and a test ride done, she purrs and flies - I posted about it briefly with some photos earlier.

And, I'd move my own legs on before I'd move this bike on now.

As for taking it steady, I've been trying most of my life heheheh, cheers again muckah.

I'd finally call her Finished'!

Carb was full of crap, emulsion tube was packed solid half way up on the inside, and the remaining little holes were not fully clear.
Had that US cleaned at Rea Racing, flushed and refilled the coolant system and then finally, upped the front sprocket from standard 16 teeth to 18.

I swear this is what the engine needed, this gear ratio set is perfect for what I need, and now I can do 50 or 60 mph without having to rev to 9k+ nor am i hammering frantically up through the gears like a psycho it's beautiful!

https://ibb.co/hypCY1s
https://ibb.co/zZ7gNJj

@Calum

My heart belongs to the ring-a-ding-ding, though!

I plan on doing a few longer journeys on this as well so an e-bike wouldn't have suited, but I did consider it.

Also I'm currently riding via serial CBT's on L plates!

The day-to-day stuff I'll get my head around in no time, and I'm lucky enough, that when I need bigger jobs doing, my local bike mechanics are ''Rea Racing'', not only an actual racing team/family here in the UK, but really top guys too.

Just to add - I have been having carb troubles as per my other posts. This afternoon I wheeled the bike into my neighbour-buddy's garage, removed side panels, seat and tank then the carb, opened it up, removed the jets, tapped out my first ever emulsion tube and started removing all the massive amounts of gunk from within, took the carb and bits to Rea where they are now being ultrasonic cleaned ready for reassembly etc. tomorrow.

My back went out as I got to the garage, and it was tough wheeling the bike up the gentle slope into the garage, especially since it weighs twice what I currently do (seriously 2x plus 10lb -
bike wet weight 262.4 lbs. me without my rags at 126lb!), but the toughest part was slaying the demons making me feel I couldn't do it at all - the parts all came off in the fashion they looked like they should, and it was a smooth, unrushed process lasting a couple of hours in total, and I only slightly skinned one knuckle heheheh.

So you see, my beliefs are locked in a different universe than the actual reality and they hold me over there with them, until I manage to stand and leap the gap and get it done, and for the first time in my life since I was a tot, it sometimes takes a little unnecessary-seeming 'hand-holding' to get me started. Previously, I was ferociously independent and just did almost everything myself flying blind.

Cheers again Callum!

Shaun/FloWolF

P.s. - are you a UK native too?

@Calum

You misunderstand me, but then again I likely haven't explained - I'm a 55 year old 'competent' amateur mechanic and I am not new to motorcycles, one of my previous jobs was for Newtronic Systems ( Formerly Piranha Ignition my dad owned it) as tech support for our bike and car ignition systems. As a young teen, I opened up and fixed my field beater bike engines without any books or anyone to ask - I looked at the engine, and how to take it apart and rebuild it spoke for itself. I built my own chain tensioner so I could swap front sprockets on my TY50 whilst down at the fields, I've long loved taking on challenges and problem solving of all kinds.

HOWEVER, and it's a big one for me, my body is sore back and such are rough as hell, my hands don't want to wrench-wrestle anymore, and it now appears I am AuDHD with all my syemptoms flaring right up these past few years, and I have the biggest case of 'imposter-syndrome' beating me away from my capabilities and denying me access to the confidence of all my experience.

Can I do these jobs? HELL YES! Is it a battle? You bet your right auntie and her favourite cat it is; I have to put down huge demons before I can even pick the tools up, and then it hurts.

So, the distillate from that little still is that I do NOT want to take it on, just because I am capable.

I hope that makes my attitude a little more understandable.

Thanks Callum. Be well

@SpookDog Heh thanks, I feared as much! I'm just getting past being this hands-on with this sort of stuff heheh. Cheers again!

There seems a fair amount of slack in the chain for the type of suspension pivot these have, so I'm wondering if I can swap between standard 16 tooth to bigger 18 tooth front without realigning the wheel for chain tension - anyone here any experience?

Cheers!

Shaun.

The tank isn't vacuum locking, tank filters aren't blocked I've checked them now. I'll be pulling the tank etc. tomorrow or day after and taking the carb off completely - I'll not be happy until I know it's clean inside. Cheers!

@SpookDog

I've had blocked tank breathers before, and seen plenty correctly diagnosed by others and the vacuum stopping the fuel delivery symptom is plenty real.

I've had the cap off and in bits now so I know there's nothing wrong with that, just wanted to check I hadn't missed something like a seperate breather pipe elsewhere.

Next job I'll drain the tank and check the tank filter, then work naturally onwards from there, then.

Cheers bud!

Shaun/FloWolF

My cutting out symptoms seem to match a blocked tank breather for cause. Is the tank vent built into the insides of the lockable fuel cap somehow, ir is it elsewhere on the tank?

Cheers folks,

Shaun.