1979 38mm KTM forks

[GeorgeBressler]

Does anyone know how many cc's of oil in each leg?
Thank you guys
George B

[skiracer]

With the fork tubes compressed without the springs I fill the tubes 6" from the top. I then go ride to see how it feels for me, and adjust accordingly. I use ATF in all my bikes and like the response it gives me. Remember, you are the riders, so it has to feel good for you, not what is good for others.

1976 250 MC5 Original Owner
1976 Penton 175 XC

[GeorgeBressler]

Thank you skiracer
There was a post 13yrs ago(!) from Rocket with a chart of all/most Penton/KTM fork capacities...
1979 mc80 250/400/420 Marzocchi 38mm 275mm travel
365/390cc 10wt

I would imagine(?) 365 is the min & 390 is the max
I am going to fill w/ 377cc 15wt without spgs & measure to top

THX AGAIN
George B

[454MRW]

The two different measurements are whether you actually disassemble the forks completely or whether you just drained them.

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Penton
1976 MC5 400
1978 KTM 78 GS6 250
L78-79 MX6 175-250 KTM's
1976-78 125-400 RM's
2007 CR125R Honda
1977 MC250 Maico
2017 KTM Freeride 250R

[Rocket]

Here is a chart with fork oil capacities.

1979 MC80 250/400/420   Marzocchi   38mm   275mm   390cc   365cc   10wt
1979 MC80 125/175   Marzocchi   35mm   250mm   300cc   280cc   10wt
1979 MX6 250/400   Marzocchi   38mm   270mm   390cc   365cc   10wt
1979 MX6125/175   Marzocchi   35mm   250mm   300cc   280cc   10wt
                  10wt
1978 GS6    Ceriani Leading Axle   35mm   240mm   230cc   215cc   10wt
1978 MC5   Ceriani Leading Axle   35mm   265mm   270cc   250cc   10wt
1978MC5 250/400   Marzocchi    38mm   270mm   380cc   360cc   10wt
1978 MC 5 125/175 & All GS6   Marzocchi    35mm   250mm   280cc   265cc   10wt
1977 GS6 & MC5   Marzocchi    35mm   220mm   240cc   220cc   10wt
Late 1977 MC5   Marzocchi    35mm   240mm   265cc   250cc   10wt
1976 Cross Country or MC5   Ceriani Leading Axle   35mm   220mm   230cc   215cc   10wt
   Marzocchi    35mm   220mm   240cc   220cc   10wt
1975 All Models   Ceriani Straigh Leg   35mm   190mm   235cc   220cc   10wt
1972-1973                              Ceriani       32mm               135cc                        10wt        

The bigger cc is for a total rebuild, the smaller cc is for a drain and refill.
RCG