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Your tech and rid­ing is­sues sorted

Motorcycle News (UK) - - Garage -

I am a com­pe­tent home me­chanic and have bought a re­place­ment brake line kit for my Du­cati Mul­tistrada 1200. Is there any­thing spe­cific to my bike that I need to be aware of be­fore I set about it with the span­ners and bleed kit? John Smith, email

AAn­swered by Si­mon Lane, Hel Per­for­mance As well as up to nine brake lines, mod­ern Anti-lock Brake sys­tems fea­ture an ABS con­trol unit with lots of valves and pas­sage­ways and a sep­a­rate ECU on a CAN bus sys­tem to run the soft­ware. Du­catis are gen­er­ally eas­ier to set up be­cause the de­sign of the ABS con­trol unit seems to al­low the fluid to flow through. How­ever, other makes, like Har­leys and BMWS run soft­ware that opens up all those valves in such a way that it is very easy to get a bub­ble some­where that will have ABS warn­ing lights flash­ing.

If the pads are al­most worn out that means the caliper pis­tons have been ex­posed to road crud and when they are eased back in they can get dam­aged and start draw­ing in air. When you bleed up brakes man­u­ally by pump­ing the lever or pedal through its full travel there’s also a risk that the mas­ter cylin­der seals might be­gin to leak for the same rea­son.

Ra­di­ally mounted mas­ter cylin­ders often have a bleed nip­ple which makes life much sim­pler. If your bike doesn’t have this, it’s often bet­ter to fit an af­ter­mar­ket dou­ble banjo with a bleed nip­ple.

Should I buy a Q ‘ringer’ back?

I pur­chased my bike just over a year ago but didn’t re­ally get on with it so re­cently sold it on. The pur­chaser has es­tab­lished that the bike has a dodgy frame num­ber, some­thing that nei­ther I nor he checked. I feel bad so I’ve of­fered to buy the bike back from him but he’s de­cided to keep it with a view to us­ing it or sell­ing it on. Where do I stand and what will hap­pen if he does sell it on, it gets iden­ti­fied as a ringer and is traced back to me? Name and ad­dress supplied A I am as­sum­ing the bike is stolen, hence the dodgy frame num­ber. If so, as you didn’t know at the time of pur­chase you will be fine and you have not com­mit­ted a crim­i­nal of­fence. How­ever, if you take it back that could be han­dling stolen goods, which is a crim­i­nal of­fence. The per­son who now has the bike should re­port it to the po­lice and as he didn’t know ei­ther at the time of pur­chase he is also not guilty of a crime. How­ever, now that he is aware, if he keeps it he is com­mit­ting a crime.

Any re­fund payable will de­pend if you sold it be­fore or af­ter Oc­to­ber 1, 2015. I am as­sum­ing af­ter from your email but I don’t have ex­act dates. The Con­sumer Rights Act 2015 en­ti­tles the chap who bought it off you to a full re­fund. Pre­sum­ably, how­ever, this is for him to re­quest. The point is you are in the clear and what the pur­chaser does or does not do is down to him. You can­not be li­able due to your lack of knowl­edge. Whether you wish to alert the pur­chaser to the le­gal po­si­tion and of­fer the re­fund is down to you. Just don’t buy it back!

ABS can make swap­ping brake lines a bleed­ing night­mare

Is the HP4 Race the shape, and ma­te­rial, of things to come? BMW are look­ing to put into pro­duc­tion car­bon frame tech­nol­ogy

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