Driveline

At first, the complete exhaust line (silencer, manifold ...) and the engine are not enough without a transmission for a motorcycle to run. It appears in fact, the Harley Davidson is no exception to this rule. Indeed, the American brand is based on a primary transmission and another secondary.

Also, the driveline connects the engine with the clutch/gearbox assembly. Besides, it is fixed on the crankshaft.

However, the Harley is now equipped with 6-speed gearboxes as well as stiff AR frames. Thus, the latter slightly conceal rear shock absorbers installed under the engine.

On the other hand, Harley Davidson offers the 1130 and 1250 V Rod models with its dual ACT and 4 valves per cylinder.

In short, HolyDeath offers avid riders a catalog of spare parts for:

• The transmission of your motorcycle, stand, gears, crankcase gasket, end cap, starter, dial, piston, tire, handlebars, radiator
• Motorcycle accessories: front fender, rims, handles, windshield, motorcycle saddle, helmet, bag, luggage, footrest
• Headlights, tail light, turn signal
• Air filter, oil filter, lubricant
• Braking, brake pads, brakes, pad holder

Harley Davidson motorcycles engine transmission

In principle, all 2007 models, except for the Sportster and V-Rod models, are equipped with a 6-speed transmission. Also, the secondary transmission is done by belt.

However, there are 3 types of transmission for a two-wheeler. Indeed, some motorcycle models can be fitted with chain, belt, and Cardan shaft transmission.

It appears in fact, the Harley Davidson chooses the first method as well as the second for some models (besides scooters). Also, several large engines are fitted with Cardan shafts, such as the Honda Gold Wing and many BMWs.

Finally, HolyDeath provides you with a chain drive kit to convert the belt drive. Thus, you will find parts and accessories in the kit, including:

• PBI front sprocket
• Rear sprocket
• Rear spacer
• ARP bolts
• Bikemaster 530 X ring chain

The Harley Davidson's twin-cylinder open at 45°

At first glance, the Harley Davidson identifies with its construction around their original twin-cylinder open at 45°. Indeed, the Springer Softail motorcycle displays its fork parallelogram with the front shock absorber, in the center above the wheel. Also, you can see the small rebound springs at the top of the compression springs.

Moreover, the legendary motorcycle qualifies itself by the sound of its engine, due to the lag of combustion. Thus, the twin is characterized by its two cylinders aligned one behind the other, although the bike kept the same chassis. On the other hand, the other V2s are fitted with connecting rods mounted side by side. However, this option does little to help cool the rear cylinder, which is installed away from its front counterpart.

Besides, the manufacturer assigns to the rear cylinder a slightly enriched carburation and a cooling of the pistons.

4 camshaft transmission

First, the Sportster’s engine is equipped with 4 camshafts and overhead valves. However, this engine with cast iron cylinder heads has not been installed on some H-D motorcycle models since 1985.

Indeed, this engine is equipped with distribution by 4 camshafts incorporated laterally. It appears in fact, each camshaft controls a valve using a rod and a rocker arm. Also, you will still find this technology on the Sporstster range.

On the other hand, the “Twin cam 88” signals the arrival of the transmission with 2 double camshafts. Thus, the cylinder heads only include 2 valves per cylinder.

Finally, the hydraulic valve lifters systematically take up the valve clearance.

A separate transmission of a Harley Davidson motorcycle

First, you will only find the separate gearbox on the "big engine". Indeed, a double or triple chain, associated with a multi-disc clutch in an oil bath, ensures the transmission of the movement.

Besides, the secondary transmission of a Harley is distinguished by the use of toothed belts. These are reinforced with Kevlar.

In other words, the rear suspensions help the belt work by slowing down variations in tension.