| Modification |
Africa
'02 |
Americas '03 |
RTW '05 |
| Balance Engine |
- |
Swampy
at Marsh Performance recommended balancing the crank, conrod and
piston. The reason for the wide variability in the smoothness of 640's
is that KTM use one set of criteria for all 620, 640 and 660 engines. |
- |
| Oil pump |
- |
Swampy
modified to increase the oil flow by 20%. This should help on sustained
high speed runs. |
- |
| Exhaust |
DAM
exhaust, rejet and air box mods. For more power and more noise.
The louder noise makes it much safer. Cars and especially pedestrians
walking in the road hear you coming and hopefully get out the way.
With a quiet exhaust they don't hear you and can easily try and cross
the road in front of you. I wear ear defenders to avoid tinnitus.
 |
Akrapovic Titanium exhaust. Wonderful sound
and a lot lighter.
|
The Akra downpipes were wearing against each
other and the exhaust packing didn't last long. Impossible to repair
titanium so I went back to the standard pipes and a DAM exhaust again.
New Akcra system fitted by Sommers. |
| Carburettor |
Standard Mikuni CV |
Standard Mikuni CV |
Keihin FCR41 MX fitted by Sommers
Fantastic!
- Instant response.
- Better kpl
- Very light throttle action. |
| Dynojetting |
- |
Swampy
set up my bike. Apparently Ackrapovic systems must be dynoed because
they vary so much individually. |
- |
| Heavier Clutch Springs |
Fitted for longer life. |
- |
- |
| Sand air filter |
Extra filtering in dusty conditions |
Same again. |
Still in use. |
| Reusable
stainless oil filters |
Saves carrying any spare filters. Clean them
in petrol, dry out in the sun, blow with an airline and replace.
|
Same again. Put the filter on the cover and
then insert it in the engine to ensure it is located properly. |
Still in use. |
| Duke
clutch cable + spare beside it |
The original cable is not too strong. Duke cables
last a long time. Make sure the routing and mounting is right. |
Now hydraulic. |
- |
| Venhill
pull throttle cable |
Another show stopper. Stronger than the original. |
Spare taken. |
- |
| Spare gear lever |
And again if it breaks. |
Bash plate protects the gear and rear brake
levers. I carried the spare for eight months and only needed it when
I dropped it in front of my flat without the bashplate on which bent
the lever. |
- |
