My 100PD has been getting steadily tired and worn over the years that I've owned it (original UKGSer advert here http://ukgser.com/forums/showthread.php/108751-PD-with-f-amp-*-ed-big-ends). When I bought it the original engine was the victim of a the $2000 O ring fail. The bike had been fitted with an 81 bottom end that was always a little suspect and turned out to have conrods that were 30grams different in weight from each other (max 3g is the spec), for the past couple of years the bikes been running a nice Moorespeed engine with loads of uumph but ultimately too much power for the chassis so I've had a hankering to refit the original engine.
One tired looking engine in Bulgaria
The original front bearing housing, crank, conrods, cam etc were all scrap. The engine had broken up through lack of oil and all the scrap metal had gone through the oil pump housing wrecking it completely. a good inspection of the engine showed a lot of debris in the oilways so I washed this all out and had a better look. Apart from the parts mentioned before the only substantial damage to the crankcases appeared to be the oil pump housing, this was very badly scored where the debris had gone between the pump rotor and the housing. I decided to take a punt and shipped the crankcases off to Motoren Israel for their oil housing repair. Israel are a great company to deal with, I had an email to say it had arrived, the repair was carried out in the length of time they said it would and shipped back to me promptly - can't speak highly enough of them
Nice repair?
In the new year the engine went on to its next phase at Moorespeed. I didn't want another tuned engine, just wanted it in standard tune. Richard sorted me out with another crank and rebuilt the engine with new bearings and seals. It came home last week.
Moorespeed acid washed the cases to flush out the crap. As well as fitting new oil pressure release valve and spring and cleaning out the pressure relief valve in the filter housing.
New camchain fitted - you can see the new Blue bearings
Conrods fitted - these are just under 1 gram difference in weight between the pair.
New flywheel fitted to replace the worn original.
Moore speed fitted one of their own oil pump outers. The new BMW oil pumps have doubled in price and also have a poor design with a very sharp edge that's going to cause wear. On top of that the machining sizes are very suspect.
This is one of the new BMW pumps. I didn't want one of these anywhere near my newly refurbished housing. The suspicion is that BMW are having them made in China and allowing whoever is making them to manage the quality (bad move) the rotors are undersized on the outer diameter and thickness. The outer diameter is worrying because of the sharp edge next to the dip in the circumference, this is really going to dig into pump housings. Theyre also machined off centre so the pump tolerances are effectively knackered before you even use one. The Moorespeed outers are the same as the original BMW ones.
Heads and barrels are ok and don't need any work. Theyve been ultrasonically cleaned to knock the worst of the road crap off them.
I'll post some more as the project moves along.
One tired looking engine in Bulgaria
The original front bearing housing, crank, conrods, cam etc were all scrap. The engine had broken up through lack of oil and all the scrap metal had gone through the oil pump housing wrecking it completely. a good inspection of the engine showed a lot of debris in the oilways so I washed this all out and had a better look. Apart from the parts mentioned before the only substantial damage to the crankcases appeared to be the oil pump housing, this was very badly scored where the debris had gone between the pump rotor and the housing. I decided to take a punt and shipped the crankcases off to Motoren Israel for their oil housing repair. Israel are a great company to deal with, I had an email to say it had arrived, the repair was carried out in the length of time they said it would and shipped back to me promptly - can't speak highly enough of them
Nice repair?
In the new year the engine went on to its next phase at Moorespeed. I didn't want another tuned engine, just wanted it in standard tune. Richard sorted me out with another crank and rebuilt the engine with new bearings and seals. It came home last week.
Moorespeed acid washed the cases to flush out the crap. As well as fitting new oil pressure release valve and spring and cleaning out the pressure relief valve in the filter housing.
New camchain fitted - you can see the new Blue bearings
Conrods fitted - these are just under 1 gram difference in weight between the pair.
New flywheel fitted to replace the worn original.
Moore speed fitted one of their own oil pump outers. The new BMW oil pumps have doubled in price and also have a poor design with a very sharp edge that's going to cause wear. On top of that the machining sizes are very suspect.
This is one of the new BMW pumps. I didn't want one of these anywhere near my newly refurbished housing. The suspicion is that BMW are having them made in China and allowing whoever is making them to manage the quality (bad move) the rotors are undersized on the outer diameter and thickness. The outer diameter is worrying because of the sharp edge next to the dip in the circumference, this is really going to dig into pump housings. Theyre also machined off centre so the pump tolerances are effectively knackered before you even use one. The Moorespeed outers are the same as the original BMW ones.
Heads and barrels are ok and don't need any work. Theyve been ultrasonically cleaned to knock the worst of the road crap off them.
I'll post some more as the project moves along.
Loving it already.
