DT125R FORUM

Okay, a few more NOS parts ordered and now the primary drive gear, clutch basket and generator nut all torqued to spec! [image: clutchAssembly01.jpg] All 6 TZ750 clutch springs fitted with brand new clutch plates and NOS OEM damper rings installed. I also replaced the factory pressure plate with a gorgeous billet RDLC Crazy pressure plate. [image: clutchAssembly02.jpg] It's said to have better oil flow and looks to have a fair amount machined out of it, but I was surprised to see it's slightly heavier than the factory setup. [image: clutchAssembly03.jpg] This milestone marks the completion of the bottom end There's just the matter of the water pump to install, I was really hoping to get a Chariot Performance uprated one, but they're no longer manufacturing them. And then there is a company that makes a stunning carbon fibre generator cover/chain guard. I did have my eye on a Chariot Performance one, but again they seem to no longer be making them sadly. The cylinders are booked in with Mick Abbey for some mild porting work, then the heads need to be sent off for machining. But once that's done it will mark the engine work completed for this project and I will turn my attention to the frame. The frame has now been moved into the garage and I'm just trying to figure out how/where the steering damper should be fitted!

@calum said in Athena 170 porting: @lllDennis I read that the port timings were off by 3mm because apparently the barrel was based off a dtr200. How true that is... Would love to see before and after dyno pulls though. See how the stock Athena compares to a modified one. I have compared Athena 170 kit vs 3MB P (and 2RH) cylinders, the only 2 things that's off the athena kit is the piston taller than the stock,the ports are exact copy off the 3MB just a bit wider and the c port is little lower and matches more a 2RH cylinder The 170 is a mix between the 200cc casing (for the cooling canals and ypvs location) and 125 portmap internally.I searched for a piston that has the dimensions of the 56mm and with bore of 65mm but there is not,only some aftermarket forged that are max 61mm have the right piston height (pin to top).