Spacer cylinder head BGM Malossi 210ccm Vespa PX200
0 Products | £0.00 |  CHECKOUT
SHOP BY MODEL
SHOP BY BRAND
Spacer cylinder head -BGM ORIGINAL Malossi 210 cc- Vespa PX200, Rally200 - 0.8mm
Spacer cylinder head -BGM ORIGINAL Malossi 210 cc- Vespa PX200, Rally200 - 0.8mm
Spacer cylinder head -BGM ORIGINAL Malossi 210 cc- Vespa PX200, Rally200 - 0.8mm
SKU:
51614
BGM ORIGINAL
Add on wish list
In Stock - EU Warehouse
7-12 Working Days Delivery
PRICE: £8.36
incl. 20.00% VAT plus shipping
 x 
If a crankshaft with more stroke is used, this additional stroke must also be compensated for two reasons. On the one hand because of the mechanical conditions to prevent the piston from hitting or the engine from running with too high compression, on the other hand to keep the control angles of the cylinder, which determine the performance, within reasonable limits.
If the stroke is extended, the control angles are also extended. This means that the scavenging channels in the cylinder (overflow and exhaust channel) are open longer. On the one hand this is very good to generate more power, but on the other hand it can also backfire if the head angles are no longer within a reasonable range or if the remaining components no longer support the achievable speed.

The head angles change most if the additional stroke is compensated at the cylinder base. With a stroke increase from 52mm to 55mm, i.e. 3mm, 1.5mm would have to be underlaid at the foot OR head here. So no 3mm compensation seal is used but only 1,5mm because the piston moves 1,5mm up AND down.

Now 1,5mm is underlaid at the base, due to the angle function of the crank drive, the overflow time increases disproportionately to the exhaust angle. Both angles, overflow and outlet angle, should however always be in proportion to each other for a well-functioning flush. The outlet channel should always open for a certain time before the overflow channels to give the old gases enough time to escape and make room for the incoming fresh gas. If the function of this process, known as the pre-exhaust angle, is disturbed by a too high overflow angle (or an exhaust angle that is too short in relation to the overflow angle), the power delivery in the upper speed range will be massively disturbed. Then the best exhaust system simply doesn`t work anymore because it lacks the surface to breathe. If the exhaust is a real racing exhaust that only makes music in the upper speed range, this is usually accompanied by a pronounced lack of power in the lower speed range. So the engine would be slower than an original engine, despite more stroke and expensive exhaust, because the exhaust steals the torque from the bottom and the cylinder cannot deliver it from the top. The smaller the angle, the less purge loss the cylinder has, but also correspondingly less power in the upper rpm range. On the other hand, a large pre-exhaust angle is perfect to support high performance exhaust systems, but carries the risk of losing a lot of power in the lower speed range.

For the beginning it is therefore usually more recommendable to compensate the extra stroke at the cylinder head to avoid too high a change of the head angle.

If a compensation at the cylinder base is desired, which is usually easier to realize with water-cooled engines, the exhaust angle often has to be adjusted mechanically, i.e. the exhaust must be milled to achieve the desired forward exhaust angle.

However, depending on the cylinder type, this requires skill, tools and know-how.

Calibrating the control angle is just as essential as the subsequent adjustment of the ignition angle and carburetor spraying.



cylinder head gasket -BGM PRO- 0.8mm Malossi 210ccm (aluminium)
AI-translation

SKU:
51614
DELIVERY:
7-12 Working Days
BRAND:
BGM ORIGINAL
WEIGHT:
0,01 kg
There are no customer reviews yet.
MY ACCOUNT
Paypal Comodo Credit Card Sagepay Interlink Express Royal Mail
INTERNATIONAL
SOCIAL MEDIA
facebook vimeo instagram youtube snapchat

Click & Collect
For the scooters and bikes of: Adly Aprilia Benelli Baotian BTM CPI Honda Hyosung Keeway Kymco Malaguti PGO Vespa Peugeot Piaggio SYM TGB Yamaha and many more, we are offering spare parts & accessories of brands like: Airsal Arreche Artek GiVi Heidenau Kenda Koso Kymco Leovince Malossi Naraku Polini Turbokit Top Racing Tecnigas and Yasuni. From exhaust, cylinder kit, drive belt, clutch, crankshaft, CDI, carburettor, air filter, battery to body parts - we have it.

All prices are shown including VAT plus shipping costs when applicable based on service requested at checkout. Sitemap
® All brand names, trademarks and registered trademarks are property of their rightful owners and are used only for description.
© Racing Planet Vertrieb GmbH 2004-2015 | CENTRAL LEISURE Ltd. trading as RACING PLANET UK
*incl. VAT plus shipping
01384 265356
01384 265356