hi sam
the tank was from a r100rs so the front mount was fine i only had to fix the rear end of the tank to the frame with a couple of bolts the only problem was the ls tunnel under the tank is wider than the r100rs so i had to move all the relays and fuse block to under the seat hump
the monza cap was from a company called vonzeti they were on e bay but i can't find them now but they do have a web site
it is a screw in filler cap that comes with a blanking plate to fill the rest of the whole left by the orignal cap but i just filled it in with filler to make it look better
the speedo is from danmoto.com a chinese company but there are uk distributors but they are a bit more expencive i got mine direct from there web site with no problems at all
hope this helps sam