Willenium

I rode an MT-03 back in 2006 while there was one on demo at a local dealer. Plenty of torque to keep you out of trouble and the power delivery is not too ferocious which makes it brilliant for newcomers to big bikes. Being a single cylinder engine, the power range is fairly limited and I was nearly spat over the front when the rev limiter stepped in. Top speed I saw on the clock was 139km/h. The seating position is far more upright than a sportsbike and if you're not after monster speed then this is a pretty good bike to consider.

Good thought. Stock gearing is 16/57 on post 2000 models. I personally opted for a larger front sprocket to stop it revving so hard in top gear. I tried an 18 in the absence of a 17. That was far too big and top speed was very limited. The 17 tooth gave a reasonable balance but due to my weight, sometimes it struggled a bit going uphill or against a strong wind.

Normally I wouldn't believe claims of people doing anything more than 75mph on a DTR. I will accept claims of around 80-85mph now as I have followed a crazy friend of mine and seen with my own eyes 85mph on my YZF clocks. That's a real speed of about 75-80mph which is very respectable for a 125cc scrambler. Sounds to me like you guys have carb problems. My 2001 DTR with my weight aboard topped out around 65-70mph but accelerated to that speed fairly swiftly.

Not a problem, can you get the carb off? Once you've got the carb off the manifold and hanging down, remove the screws on the bottom and the float bowl should come away which exposes the floats and jets. The jet you need to change is the one in the middle. Being as your bike is a 2003, the standard fit main jet is a 240 which you replace with a 260. Reassemble as you took it apart and you should be good to go

As I've said many times before, start with the basics and go from there. First off sort out the exhaust by either getting an aftermarket performance system or gut the stock one. You'll then need to get more air flowing in so remove the rubber airbox snorkel and rejet the carb with a larger main jet to compensate for the extra air. That should help to free up some more power and make the bike more responsive.

Full DEP exhaust system, remove airbox snorkel, rejet carb. That'll allow for a healthy power increase.

Suppose it doesn't really help my fork seals have leaked the majority of the oil out. Looking at getting them done soon so might start getting some better response from the bike. Will keep you posted.

Shame you lot don't live near me. I'd take great pelasure in pulling one of the bikes apart to find the problem and report back.

Me? R1? Not yet I'm afraid. Insurance was very steep last time I checked. My friend was going to get one but has not been very sensible with his money and doesn't have the capital to buy one yet. To make matters worse, he now has a woman (Oh dear ) and his car broke down today. Looks like he wont be having an R1 after all!

Whereabouts in Herts you from dude?

Very nice mate I spy an aftermarket tail light, DEP silencer, Cemoto SM mudguard and missing fork gaiters? Should get a DEP front pipe and a set of Avon Distanzia tyres. You'll be the nimblest thing in town then

It's just some sort of recirc hose. Block the end of it and tuck it away neatly.

No problem. LC: http://www.bikez.com/pictures/yamaha/1983/...c%20Leclerc.jpg http://topsk.com/yamaha/yamahaphoto/DT125%2034X.jpg R: http://www.hojliv.se/gallery/files/9/2/027.jpg http://wazaari.net/img/kemonomichi/IMG_0402.jpg

Shame you're not a bit closer or I could spend half a day or so getting it running correctly, or at least finding the problem.

DEP silencer is BS stamped on underside so will pass MOT legally. Front pipe is not BS stamped but will go through anyway because it's a full system that does show a BS stamp on it.

I had mismatched tyres on my Cat when I bought it. There was a Pirelli Dragon Evo Corsa 120/70ZR17 on the front and a Pirelli Diablo 160/60ZR17 on the back. The Dragon Evo was pretty knackered and the Diablo was new so I decided I would probably wear the rear down before changing to a new set. Bought a cheap Michelin Macadam front off eBay which was an awful choice. Upon fitting correct sized tyre, handling improved a small amount but the bike still handled badly. Due to never being able to ride properly on Pirelli tyres, I opted for Michelin Pilot Power tyres which are currently fitted and a massive improvement over the Pirellis. I run 38psi in the rear and 34psi in the front which seems fine but the suspension is rather wallowy when dropping into a corner (Probably due to being a 1996 4TV1 model). I probably wont be bothering to buy any aftermarket suspension or renewing the stock items as I feel the Cat will never handle as solidly as a true sportsbike. I might chop it in for an R6 if I wish to stay with Yamaha or I might get an early to mid 90s Fireblade.

It's a 250 4T so I'd have thought about 25-27hp thereabouts.

Depends what you want in a bike. The Thundercat is more sporty than the Fazer but the Fazer will be kinder on long journeys. They share the same engine with the Fazer being in a slightly lower state of tune. Compared to proper sportsbikes, the Thundercat is a bit sloppy in the corners but doesn't lose anything on the straights.

Well yes, they do go bang but he asked what was the fastest which would be the Aprilia. The DT is more reliable but not quite as fast. Think he was joking. They generally top out around 80mph.

Those are just normal sportbike tyres which you can get anywhere providing they stock the correct size. The Distanzia is an excellent tyre for the DT which I have used myself. They grip very well indeed.

I'm a token Pirelli hater. I just can't get on with them. My friend got some fitted to his bike and it was uncomfortable to ride and ended up with me being sptat across a field. There was a pair of Pirelli's fitted to my Cat when I got that and they were awful too. Once they completely wore out I got a set of Michelin Pilot Power tyres which are incredibly good. Good grip even from cold, excellent life on them and they don't really cost that much more than other sporty tyres.

The DT-X is a Supermotard so it has different sized wheels and lots of SMs have bigger brakes too. Ultimately the smaller wheels aid a faster turn-in time making the bike more nimble in the technical sections of a track. The DT-R and DT-RE are scrambler style bikes so you get larger wheels with knobbly tyres to give better grip off road. The gearing is low so you don't go very fast at top end but acceleration is quite brisk.

Aprilia MX125.

When I had my DTR fairly stock I did 110 miles and still hadn't run out. After doing my full mod setup I was struggling to do that. Would've been more like 60-70 miles to a tank.

Usually start to pull properly from about 7k. When I've got my stubby on it sounds almost like VTEC kicking in haha.