DT125R FORUM

Okay I'll Do a plug chop when I get chance they normally come out black because I premix and all ways
Tend to do the mix a little rich to be safe I deffo think it needs up jetting tho

@Calum hmm interesting it’s a option, got a lot of research to do on the radiator situation, my choices at the moment, source the Dt200r radiators, I also thought about buying a set of twin ally radiators and take them to a welder along with the dt brackets and say make me some new brackets with all these mounting points for on the frame and air scoops ect but weld new for these radiators and now these Lanza radiators could
Also be a option

@ryanjimccfc The shocks for all 3 bikes are 410mm in length and the YSS item is listed as being compatible for all 3 bikes, which means it should be a straight swap for the OEM unit. The YSS unit's also offer adjustable pre-load and compression too, just the same as the DT200/Lanza's units just without the external reservoir, so you are getting pretty much the same spec as a used 200 unit all in one package. Plus I think the YSS has a stiffer spring over the original shock? So all_in_all it's a simpler upgrade with less hassle of fitting and mounting the res. If you have the cash then I would go for a new and improved shock over an old used unit everytime. 😉

https://www.ebay.co.uk/itm/YSS-REAR-SHOCK-YAMAHA-DT-R-200-1989-2006-SHOCK-ABSORBER-331/183127097768?epid=24009232077&hash=item2aa339c1a8:g:ai4AAOSwRH5XKxXH

https://www.ebay.co.uk/itm/YSS-SHOCK-ABSORBER-ADJUSTABLE-REAR-MONO-For-Yamaha-DT-125-R/142012163491?epid=517329238&hash=item211095a5a3:g:2mcAAOSwnFZXUAUJ

@glynn123 The thermostat provides several features. And the one you're referring to is the less significant one.

Yes the thermostat allows for quicker warming up of the engine, prevention of a heat seizure when the radiator dissipates too much heat, but that is only part of the story.

The thermostat also acts as an intentional resistor in the water jacket. It will prevent stale, localised boiling, of coolant within the jacket, by pressursing the water. Thus the exchange of coolant is made causing any boiled pockets of gas to be moved on and either vented out through the radiator cap, or through the rest of the cooling system.

This feature stops the cylinder distorting, or more importantly, the cylinder head, where most the heat will occur.

@ryanjimccfc Alright. Make sure the casting is flawless and that everything fits without imperfections.

I have YFS200 blaster vforce4 in my DT175/225MX, they just fit straight in bike has a stroker blaster crank blaster topend, i think they would be a bit narrow for a dtr. Wr200 might fit with a bit of moding. I have a DTR/YZ 125 engine running standard reeds with one and a quarter sets of petals to prevent high rpm flutter. Modded yz inlet rubber just to bolt holes need drilling and a bit trimmed off the right hand side, a modded open top dtr airbox with yz carb to airbox rubber with yz carb runs great