[meilaushi]

Don't you have to remove the alternator at the Engine end before removing the chaincase too?  I don't think you can remove the chaincase with the alternator in place.

[clamp]

The alternator coils are bolted to the chain case, the magnets are in the rotor on the crank pulley.

  Even the wires come straight out with a half moon rubber seal and a simple snap conector.

[Bankerdanny]

   4 speed  top gear ratio   5.7228 :1

    5 Speed top gear  -------4.726:1

      Taken from the Royal Enfield hand book delivered with the bike. Both have 2.41:1 primary.

   Even first is a little higher.

     To calculate your ratio divide drive teeth by driven

       20 teeth on the drive sprocket--40 on the rear  =2:1   + primary

      Total ratio =4.41

The top gear difference is because the 5-speed comes standard with the 18-tooth sprocket.

The 4-speed and the 5-speed both have a 1:1 top gear.

[Bankerdanny]

Changing the front sprocket is a relatively big job. It's not difficult, but it is definitely an all day or even all weekend proposition.

[PhilJ]

Dan,

Clamp has an Indian model 350. Do you think that may make a difference in the ratios?
I've never heard either way whether there are differences like that.

Phil

[clamp]

Bankerdanny is quite right all gearboxes are 1:1 in top gear.

     The drive chain ratio is the reason for the differences.

     I must pay more attention.
   

[Bankerdanny]

The 350 uses the same box as the 500 with the same ratios. However, it uses a 16 tooth front sprocket to give lower overall gearing (higher numerically) to make up for the 350's lower HP/Torque.