Here is a proper 2002 powervalve on the left and early type diamond powervalve on the right, if they were all diamond shape wouldn't have a rectangle in powervalve pully. Yamaha didn't make a 2003 they are 2002 models just registered later.

Only the older DT and TZR TDR had a diamond shaped end on the powervalve, all the later 3RM models all have a rectangle end that is an exact fit in the powervalve pully. If it is a 2003 with a diamond shaped end then it is not the original powervalve and probably not the original barrel either.

@d3cme I have a 2002 dtr imported from the isle of man, has the 3rm-20 cdi. Moved the reed switch about 6 inches just cut the insulation so could pull the 2 wires really out of the way. Mine didn't rev past 7-8000 max till moved the reed switch now revs past 11000 and goes off the clock. If you rev it stood still in neutral does it got to 11000.

@Calum yes got the head but knackered and yes the porting is not much better than standard 3mb barrel. Got a 4FU barrel with powervalve and better porting but snapped ring ruined the nikasil plating so needs a sleeve or repair and replate.

Hi @Bluestoesonnose here is a Mick Abbey ported 4fu cylinder.







If your interested I have a fully race ported 3MB00 DT 125R barrel that has just been bored and honed as well and fitted with a 57.98 Namura Piston Kit with moly coating same as Wossner pistons. It is still at Mick Abbey Tuning as well as a couple of standard barrels Mick has rebored and fitted new pistons for me, been busy so haven't got round to picking them up but in no rush for them as only selling them anyway as now run a fully ported Athena 170 kit. I only live 8 miles from Mick so if you fancy a fully ported barrel can soon pop in and pick my barrels up. Can do fully race ported barrel just been rebored as well with a Namura Piston Kit, skimmed 3MB head and a modified gas flowed power valve that is practicaly brand
new and bush with it. Ported rebored barrel and piston kit, skimmed 3MB head and
powervalve £225 posted royal mail signed for. If you still are after a luggage rack i have one on my 2003 DT, it has a couple of rust spots on it but good genuine rack,
£75 & postage if your interested can send you some photos.

Use these for my powdercoating as powdercoat a dt frame for £110
http://www.triple-s.co.uk/index.htm

Here is a proper 2002 powervalve on the left and early type diamond powervalve on the right, if they were all diamond shape wouldn't have a rectangle in powervalve pully. Yamaha didn't make a 2003 they are 2002 models just registered later.

Only the older DT and TZR TDR had a diamond shaped end on the powervalve, all the later 3RM models all have a rectangle end that is an exact fit in the powervalve pully. If it is a 2003 with a diamond shaped end then it is not the original powervalve and probably not the original barrel either.

Probably the switch for the lights as the tail light runs off the battery and the headlight runs of the yellow and black wire from engine, take switch apart and squirt some electrical contact cleaner on the parts or WD40.

Hi, what is it you want to buy. cheers

@Calum so does £70 including tracked delivery seem ok for the 3MB head as only done a few hours. What price would you say for my other 3MB with thermostat and temperature sender on it. cheers

Has a Giannelli silencer on my DT but looked way too long past my side panel so cut off 4 inches and rivetted the end cone back on. Bought some stainless steel sealed exhaust rivets off ebay and my god took some force with hand rivet gun.
The mot tester said has to have stupid bs number stamped on silencer so a failure.
Got home and looked through my bike parts in shed and the serial number is engraved in the 4 inches cut off.lol Thinking of tracing the number onto my silencer
and using my dremel to engrave the numbers.

@d3cme I have a 2002 dtr imported from the isle of man, has the 3rm-20 cdi. Moved the reed switch about 6 inches just cut the insulation so could pull the 2 wires really out of the way. Mine didn't rev past 7-8000 max till moved the reed switch now revs past 11000 and goes off the clock. If you rev it stood still in neutral does it got to 11000.

@Calum yes got the head but knackered and yes the porting is not much better than standard 3mb barrel. Got a 4FU barrel with powervalve and better porting but snapped ring ruined the nikasil plating so needs a sleeve or repair and replate.

What do 3MB00 P cylinders with 3MB head and powervalve go for these days. Have the P stamped cylinder with a 56mm bore and nice smooth powervalve along with a mint 3MB head. Anyone know what price for these bits roughly so can
list on ebay. cheers