Hi all,
Okay, we also swapped the chassis but that isn't Husaberg stuff, engine only thus. As some perhaps have followed, we use a FC550 '02 in a AYR sidecar chassis for MX. This winter I decided to rebuild the engine and wanted to have some extra bottom to compensate for the bigger engines out there.
In short; cylinder head ported, cam shaft (torque from Taffy), Wössner piston with narrower squish band, Keihin FCR41, double valve springs and Spark's SEM. Else normal rebuild; new piston, bearings, valves, cam chain etc etc (or €€€). Did all the goodies mentioned in the Owner's doc too (see several posts). Exhaust the same as last season ending up in a 50mm diameter between the BSM silencer and after the headers come together.
Starts cold/warm/hot in 1 or 2 easy kicks, no sweat! I got rid of the decompression cables, clean look and less to fuss with. Mechanical sounds reduced but it's still a Husaberg :wink: I had hoped for a mechanically complete quite engine but that's maybe too much asked for.
To the track and then it all started. There is torque, bottom, mid range in big amounts. The engine responds immediately at a turn of the throttle, not the smallest hesitation at all. I really have to keep the handlebar tight when accelerating out of the corners. Between jumps and other obstacles the improved bottom power helps to keep up the speed easily. This is awesome, strong and quick revving engine.
But one thing I don't understand yet. All I did was to improve low and mid range. But how can it be I also have an improved top end? The engine revs quicker and cleaner. Well, I won't complain
Coming weeks we will be riding to have the sidecar set up correctly and in May the racing season starts here. Look especially at the picture of the rear wheel. Tyre made in Russia, a good old fashioned 18" x 5" and finding grip even where it isn't existing actually. Plastics will be swapped for white stuff and maybe some Husaberg stickers.
Best regards,
Stephan
Okay, we also swapped the chassis but that isn't Husaberg stuff, engine only thus. As some perhaps have followed, we use a FC550 '02 in a AYR sidecar chassis for MX. This winter I decided to rebuild the engine and wanted to have some extra bottom to compensate for the bigger engines out there.
In short; cylinder head ported, cam shaft (torque from Taffy), Wössner piston with narrower squish band, Keihin FCR41, double valve springs and Spark's SEM. Else normal rebuild; new piston, bearings, valves, cam chain etc etc (or €€€). Did all the goodies mentioned in the Owner's doc too (see several posts). Exhaust the same as last season ending up in a 50mm diameter between the BSM silencer and after the headers come together.
Starts cold/warm/hot in 1 or 2 easy kicks, no sweat! I got rid of the decompression cables, clean look and less to fuss with. Mechanical sounds reduced but it's still a Husaberg :wink: I had hoped for a mechanically complete quite engine but that's maybe too much asked for.
To the track and then it all started. There is torque, bottom, mid range in big amounts. The engine responds immediately at a turn of the throttle, not the smallest hesitation at all. I really have to keep the handlebar tight when accelerating out of the corners. Between jumps and other obstacles the improved bottom power helps to keep up the speed easily. This is awesome, strong and quick revving engine.
But one thing I don't understand yet. All I did was to improve low and mid range. But how can it be I also have an improved top end? The engine revs quicker and cleaner. Well, I won't complain
Coming weeks we will be riding to have the sidecar set up correctly and in May the racing season starts here. Look especially at the picture of the rear wheel. Tyre made in Russia, a good old fashioned 18" x 5" and finding grip even where it isn't existing actually. Plastics will be swapped for white stuff and maybe some Husaberg stickers.
Best regards,
Stephan
