dan_8348956552
Retro Newbie
First post - hello! 
I have a 1992 (I think) Kona Lava Dome, which survived long untended years in the shed, before being reborn last year with nothing much more than a new bottom bracket, rubbers and skewers (and a fair bit of elbow grease too).
Got it to bits again for a service, and I've realised that there's a bit of a mismatch on the rear derailleur which maybe accounts for the occasional bit of chain skip I get when the chains a bit sticky or something's got a little out of line.
It's got a Shimano RD-M500 with an extra long cage, and a cassette of 30-26-23-20-17-15-13 with chainrings of 46-36-24.
The mismatch is that, looking at the Shimano service instructions for the RD-M500 it states that total capacity should be 38 teeth or fewer for the extra long cage, and the above works out at 39.
Could this account for my chain skip? If so, can I increase the chain tension to help? I think there's a spare hole for the derailleur spring to move to, but not sure whether this is the correct tree to bark up.
Cheers, Dan
Oh, also, the barrel adjuster on the RD is completely rusted up (about the only thing on the bike that had in all that time). The original part number is 52A 9801 - anyone know where I'd go for a replacement? Not sure if I can get it out yet, so it might be better to leave in and just rely on the adjustment at the shifter end.
I have a 1992 (I think) Kona Lava Dome, which survived long untended years in the shed, before being reborn last year with nothing much more than a new bottom bracket, rubbers and skewers (and a fair bit of elbow grease too).
Got it to bits again for a service, and I've realised that there's a bit of a mismatch on the rear derailleur which maybe accounts for the occasional bit of chain skip I get when the chains a bit sticky or something's got a little out of line.
It's got a Shimano RD-M500 with an extra long cage, and a cassette of 30-26-23-20-17-15-13 with chainrings of 46-36-24.
The mismatch is that, looking at the Shimano service instructions for the RD-M500 it states that total capacity should be 38 teeth or fewer for the extra long cage, and the above works out at 39.
Could this account for my chain skip? If so, can I increase the chain tension to help? I think there's a spare hole for the derailleur spring to move to, but not sure whether this is the correct tree to bark up.
Cheers, Dan
Oh, also, the barrel adjuster on the RD is completely rusted up (about the only thing on the bike that had in all that time). The original part number is 52A 9801 - anyone know where I'd go for a replacement? Not sure if I can get it out yet, so it might be better to leave in and just rely on the adjustment at the shifter end.
