Originally Posted by
zJatoRad
so are these officially Gen 6 engines?
Hmm - 95% agreed that these are the latest Gen 6 engines with a name change for marketing. Mark from MMods will know. He may pop on here and confirm our theories at some stage
Originally Posted by
gtxracer
How do you tell which generation you have?
There are a few external pointers you can look for. A lot of the changes are internal.
Gen 4 - Older style cooling head with just GO and 21 etched on the top of the head. Carb has silver alloy end where the HSN needle assembly screws in.
Gen 5 - Slightly tapered cooling head with more writing etched on it (GO Engine, Racing, 5 or 7 or 3 Port, some laurel wreaths around the GO symbol).
Where the HSN screws into the carb is black, but it has a sliver alloy end cap.
Gen 5.5 - Carb has a red and white GO symbol on the front of it.
Hope that helps
