Fitting a KTM 65 motor into a KTM 50 Pro Jr. is generally not a straightforward task due to differences in frame design, mounting points, and overall geometry. The KTM 65 is designed for a larger chassis, and significant modifications would be required to accommodate the motor, including custom mounts and possibly alterations to the bike's wiring and exhaust system. Additionally, you would need to consider the weight and balance changes that could affect handling and performance. Overall, while it might be possible with extensive modifications, it's not a simple swap.
no
Pro Circuit pipe for KTM 50 is between $199 and $250 depending on where you buy one.
The KTM 50 SX Junior is 23 inches, the 50 SX Pro Senior is 25.6 inches.
10w30 is what ktm recommend for a 2 stroke engine
about £1400
500ml of aft3
under the gas tank
KTM recommends .15L-.20 L of Motorex ATF Super.
you have to take gas tank off.
Motorex, SAE 15W-50
KTM 50 tops out around 50-52 mph my 06 ktm 50 hits 55-60mph
You have a 1999 KTM 50 SXR.