Shock Absorber Type 643 Competition QSD

Marsoni

M251S

$539.00

Get it in 3 business days with 1 day shipping. Friday, May 29

Shock Absorber Type 643 Competition QSD643 QSD Diagonal, traversable reservoir. Originally developed for the Honda VFR 1200, this Competition shock adds a diagonally mounted, rotatable compression reservoir to the Wilbers construction kit, unlocking multiple mounting options on bikes with limited space. The upper mount integrates the high and low speed compression adjusters for precise damping control. Spring preload is continuously adjustable with the supplied spanner or, optionally,

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I noticed the engine running much quieter using this oil. The pour mouth is pretty unique for this brand, you can just open the interior cap, pull up the accordion neck and pour into the engine which provides better control over traditional wide mouth, thus less messy. This oil rarely goes on sale and is typically 1.5x to 2x more expensive than the more common US brands.

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Reviewed in the United States on August 28, 2025

Verified Purchase

Cooch

Birmingham, US

★★★★★ 5

Best synthetic oil BMW

Excellent synthetic oil BMW 328I

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Reviewed in the United States on February 6, 2026

Verified Purchase

Malu buys everything

West Palm Beach, US

★★★★★ 5

Last long

Love it ! Since I have a BMW this oil it’s good for it . The Price is good . Last long . No engine noise Or oil burning. Even the color looks good after 3 months.

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Reviewed in the United States on March 9, 2026