Tag Archives: north

Yamaha YZF R1 Engine rebuild with pictures, part 1 of 3

We have a Yamaha R1 in that was, unfortunately, run with little or no oil, as as we all know, it could cause catastrophic damage to the engine internals, as the oil lubricates all the internals.

This blog post is part 1 of three – as the project can be divided into three parts (and the blog posts will be divided likewise). Stage 1 is the disassembly, and diagnosis, Stage 2 is the actual repair and stage 3 assembly and testing. If we make other discoveries or realise the extent of damages are far worse than we imagined, this structure may have to change.

Firstly we went to get the bike on the bench and start stripping it down. The engine was not run after we had learnt that it had been ran with little or no oil, but we turned it by hand to check for strange noises, and indeed, it was a little rough and  sure enough, there was a knocking sound! Didn’t sound good at all.

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First step was to turn the engine by hand to check for any potential damages. It was pretty rough and didn’t feel right.

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We then proceeded to removal of the engine from the frame. Several skinned knuckles and some help from another technician and the heart of the beast was plucked from its torso!

The next few pictures show the engine disassembly, to look and see where the problem was.

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Engine on the bench.

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And we started off from the clutch side.

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Proceeding onto the sump, to check for any lumps or debris caused by bits grinding or breaking off.

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A closer look at the clutch side.

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Removed the pump to check the gearbox for anything out of place.

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We then went on to dismantle the crankcase upper and lower sections, to check the actual crankshaft itself.

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Crankshaft removed, with bearing shells on the right hand side of the picture (on a shop towel).

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The shells did look battered and abnormally worn. Along with the channels that the shells sit in. The crankshaft also had some damage too.

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The pistons and conrods were, thankfully, saved. Had the engine been run for any longer, the build would have been taken to another level, of work, and expense!

We then checked over the rest of the parts, as below, and thankfully, nothing much to report here;

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Piston bores were fine,
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As was the top end and head, valves etc.
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The  camshafts are another delicate part, and damages to these could be costly, and if gone unnoticed, it could really ruin your day! We removed these and checked for run-out and ensures all the cam lobes were smooth and as intended by the manufacturer.

The damaged crankshaft has been sent to a good friend of ours, and an expert with engine internals and engine building, for repair. We will post up part two when it arrives.

Take care for now!

Ali

Off-roading in Hertfordshire or London?

Hi guys and girls, another post today  following the earlier instructional on how to change engine oil and replace the filter on your motorcycle.

offorad

As many of you know, off road motorcycle riding, on an amateur level, is becoming a declining sector in the motorcycle world. This is due to many reasons; the green-lane closures is part of them.

As many of you are aware, we have recently taken on a new manager by the name of José Teto. He has many titles under his belt for off-roading and powersports (jet-skiing!). You can see his intro video over on our YouTube channel.

Being an off-road legend, he knows all about the trials and enduro rides (having competed in many on a pro level), so feel free to come down and have a chat with him!

Since José’s arrival, we also cater to the off-road and motocross sector, whether you race, ride or just potter around off-road.

We are also happy to carry out bike set-ups for long distance enduro rides!

Get the word out, and let’s collectively liven up the off-roading in Herts and London, and look forward to the coming summer!

how to sell your motorcycle in London, we buy any bike

If you have used your motorcycle in London, it probably has a fair share of wear and tear, as well as weathering, so first thing is a major service.

This could cost dear – even if you decide to do it yourself, most home mechanics and DIY enthusiasts cannot, haven’t got the right tools, or simply are afraid of doing things like valve clearances, fork seal replacement,  tyre changes, or even chain and sprocket changes.

The cosmetics can’t really be resolved, short of a full re-spray, which as you may know, could cost a fair amount too.

Fixing it up, making it pretty and reliable and then selling it is usually a waste of money and you will, in most, except very RARE cases, lose out on money. For example, a very good condition 2002-2003-ish Honda CBR 600 currently retails at around £2800-£3000. If it is well used, expect it to be worth around £2000. You’d need to spend well over a grand on it to put it in a similar position to those selling at £3000, by the time you have done anything and everything that needs doing (valve clearances? tyres? chain sprocket? service?). In order to get your money back, you’ll have to list it up for more than £3000, in which case, people would rather pay £3000 and get something reputable from a dealer or trader.

However, if it is already in good nick, the way you will get most money is selling it privately. But then you get the usual tyre-kickers, dreamers and time wasters. You may also find that you need to work, and have commitments during the evenings and weekends, and making the time to wash, clean and then list it on the internet is time-consuming; let alone making time for the above mentioned time wasters.

If you are moving to another bike, there is always the option of a part exchange. In almost any case, no trader would want to do a straight swap (even if both bikes are identical in nature, condition and/or value!) so be prepared to part with some cash. At Hertfordshire Superbikes, we are happy to take P/Xs and are happier to give a slight discount on the price of the bike you are buying if you present the right part-exchange.

On the contrary, there are bike-buying services, similar to we-buy-any-car, who then offer you rock bottom prices. These are probably good if you want to scrap your bike, and expect £50 or so for it! They also, then expect you to take your bike there (well, if you uncovered it in the garden shed where it’s been stood for 28 years, has two seized brakes, chain so rusty, it might fall off, and a battery that’s just a heavy  paperweight, riding it to one of their centres might be tricky. If you do make it there, you will see how the criticise it and turn the £50 they promised you, into a mere £32.50!

Bike traders or dealers are also another way to get cash form your motorcycle – most of these take your bike in, give you instant payment (in cash!) and make a profit on your machine, simply because you are too “lazy” or haven’t got the time to do it yourself.

Here at a Hertfordshire Superbike Centre we buy motorcycles, but operate in a clean, transparent manner, giving you the best deal.

At the end of the day, traders need to buy bikes for stock, so why would they offer such low prices if they know they wont get a purchase?! We are realistic and bikers ourselves. We know that  happy customer is a customer for life.

If you are looking to get rid of your motorcycle, give us a call on 01707 66 33 44.

Ali