Nico Bakker RG500 ex Rob Punt

Some pics of the ex Rob Punt Nico Bakker RG500 MK6 as a shed find. For more pics see  
Nico Bakker RG500

Christian Polverelli's bike is a runner!

Want to know how it sounds
VSP500

The Suter MMX500 enters Isle of Man TT

The Suter MMX500 is going to race at the TT of Man. Most likely in the Senior TT and the Superbike races. I hope Bruce Anstey will get a seat and that its debut will be very succesful!
For more information see
500cc Suter enters Isle of Man TT
Update
Ian Lougher will race the Suter 500 at Man and the second rider will most likely be Michael Rutter.
For more information see   
Ian Lougher to race 500cc Suter at Isle of Man TT

Bremen Classic Motorshow 2016

Suzuki TR750 seen at the Classic Motorshow in Bremen Germany, February 2016.
For more pics see
Bremen Classic Motorshow

Aprilia RSW500

This time some pics of a very rare and special beast, the Aprilia RSW500. Only a handful survived the crusher.
It has 145 hp at 12.000 rpm.
For more pics see 
Aprilia RSW500

Differences between the RG400 and the RG500

When I was cleaning my mailbox I found some great information about the differences between the RG400 and the RG500, so here it is.
1. Carb slide needle and main jetting: 400 = #135 , 500 = #120.

2. Clutch: the 400 has some friction disks less (1 or 2, I’m not sure). See if your clutch will work OK so you may leave it as it is.

3. External sprockets and chain, 400 = 15 front /41 rear, 525 chain, 500 = 16/40, 530.

4. 400 pipes have only thiner stingers, all the bodies are the same.

5. Cylinder, piston: 400= 50mm 500=56mm 400 has 5 intake ports, 500 has 7 intake ports but smaller (but 400′s port in total I think give better flow – i.e. less divided area). External lower sleeve diameter 400=60mm , 500=66mm you need to rebore the upper crankcase. But I’m not sure if you can rebore your 400 cylinder sleeves to reach 56mm so you won’t need any crankcase machining (and won’t need to buy a 500 cylinder set). Remember the 400′s cyls may give a better intake port flow.

6. Heads diameter accordingly are of: 400=50mm , 500=56mm.

7. Conrods are the same, only its lower bearing consists of some more (1 or 2, I’m not sure) needles so they are closer each other. You may not bother splitting your cases and keep your 400′s bearings though if you go arround the stock 500 horse power (no much more).

8. Some small difference in the front brake rotors. 400′s are no “floating” type.

9. The rotary valves have different base, the 400′s is thinner and lighter so keep your 400.

Central Classics Houten 2015

Seen at the Central Classics in Houten the Netherlands, December 2015. Aalt Toersen his old record machine, on this bike he has set 3 worldrecords in Elvington in the UK in 1968.
For more pics see 
Central Classics Houten 2015