New member from Australia

[mark parker]

Hi, I've been into bikes for quite a while. This is a photo of my long suffering BSA A65, (the latest incarnation). I've had it a long while and have modified it a fair bit. I notice members on here building their own tanks, and modifying their bikes so thought some may be interested in my old BSA. I've adapted more modern cycle parts and made tank , seat, fairing, exhausts and a few engine bits. In 1970 when the engine was made it was 654cc, with a 360deg crank, it now has a longer stroke 90deg crank, alloy nikasil lined big bore block, (which I made patterns for and had cast) and 883cc, it also runs a very modified head with 38mm flatslide carbs, and the motor is now rubber mounted. It's very light and nice handling, and is geared quite tall doing 100MPH at 4,660RPM. So cruising at speed is very effortless, and it is especially good up hills.

 

[guitargeek]

Holy smokes! That's awesome!

What did the modern bits come from?

 

[BigBSBusa]

That's nice! Welcome.

 

[patricke9]

Wow- That is really cool. got any more pics?

 

[ericngsta]

i demand more pictures....now.

welcome to dtt, kickass bike.

 

[mark parker]

This is some video, it's with the motor before its recent rebuild, this had an alloy block with liners and cast pistons, and since then I've also improved the head, because it seems to pull much better and rev out more, though I don't think I rev it quite right out in this anyway, especially at the start following a slow car. The bike has close ratio 1st and 2nd gears and only 4 speeds. The rolling chassis is from an RGV250 Suzuki. I'm hopeing to fit a bannana type swingarm off a later model after work tomorrow, hopefully it won't involve major drama.

http://au.youtube.com/watch?v=nZUkyIWOZ6M&feature=channel

Another photo;

 

[Wee Todd]

Sorry custom cast cylinders just never happen here,,,and to stuff it into a modern chassis that doesn't happen here as well ! this site is dedicated to the reserection of barn flesh velocipedes,,,and backyard and garage finds...seized c/w plugged carbs......and rust!!!! incrediable feat of enginneering on your part,,has the main bearing been changed to the quill type feed?? through the crank??? great looking bike,,,,,I respect your diligence and patience,,,,,,,show case this in your country(magazines) or the UK or Canada,,,,,,send some pics off to Cycle Canada

 

[Tim]

That's pretty cool - nice to see a vintage heart in a modern chassis, and even better not hidden behind tons of glass.

 

[mark parker]

It has an end feed conversion, which is something BSA should definitely have done. I did my own conversion a little different to what SRM do, useing a heavy series straight roller bearing to replace the plain main bearing, and added a bearing plate on the outside of the alternator, which controls end float and supports the crank against the load from the primary chain. The crank is a modified Norton Commando with 89mm stroke.

This photo shows the extra bearing and plate on the end of the crank;