Gearbox failure

[lllDennis]

This post is deleted!

[lllDennis]

@theportingmaster The jetting was extremely rich. Apparently there are 2 sorts of mikuni jet 'sizes'. In my carb there was a 250 mikuni jet. So i ordered aftermarket 250-300 for the Athena kit to test with. But the aftermarket 180 size is the same as original 250.

It was overlay rich while tuning the carb until i figured this out.

If you got a excellent low milage gearbox for me send me a message with some details. Really appreciate it
I looked at new original parts but it's a little expensive for my student wallet

[Calum]

@llldennis dayum, that's not a stripped gear, that's completely melted

[theportingmaster]

@lllDennis Best jetting for Athena 170 is 300 main jet on the
Mikuni tm28 but with the powerjet blocked off. Just cut the
rubber tube in half from the float chamber to the powerjet then block the 2 halves of the rubber tube with a couple of 5mm threaded bolts or similar.

[lllDennis]

@calum Any recommendations on a crankshaft? While everything is open I want to replace it anyway (Has some small grooves where the bearing is). Best with original or aftermarket?

[Calum]

@llldennis Didn't know they do aftermarket cranks?

[Nottsbiker]

@calum

There's some on ebay for less than £200

[jimmydc98]

@calum pretty sure they sell the aftermarket cranks on PJME as well

[jimmydc98]

@nottsbiker https://www.pjme.co.uk/acatalog/Yamaha-DT125R-Complete-Crankshaft-Top-Racing--4596.html#SID=103

[Calum]

@jimmydc98 Cheap

That's good to know at least. Connecting Rod for my RS is that price alone