What is the difference between a FLH and FL in the mid 60s Pan Head?
Thanks for any help

 

I think the FLH had a few performance modifications...I'm think I read this somewhere.

For example, I am pretty sure motorcycles ordered for police service were FLH models.

 

H denoted .5 higher compression pistons.
WUZFUZ

 

Higher compression and different cam (H)

 

police may order high compression for a "pursuit" or low compression for "parade duty"

the H designation came in 1955 as the E OHV motor ( 61 ") was dropped from the line leaving only the F OHV motor ( 74") in FL and FLH versions

I thought the FL was dropped after '62...maybe not

mike

 

Last year for the E (61ci) was '51 or '52, then they went to a 74ci FLE, which was sort of a detuned (smaller carb and I believe shorter cam) motor for 'parade' and traffic duty. It could be left running on the side stand longer without overheating, such as while writing a ticket and ran very smoothly at low speeds. FL became the low compression 74ci and FLH the high compression motor. I'm pretty sure '55 was the last year for the FLE. This is off the top of my head. Consult Bruce Palmer's Restoration guide to verify the years.