Options, Options, Options but which ones the best?
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Yes they look good - kind of a merger between an RD125lc and a TZR125 but with a nicer looking frame
Only ones I've seen lately are all going for £3k+ right now so definitely look like people want them to command such high prices
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@Calum i not long ago passed up the opportunity to buy a full 89 sdr engine because I want sure how I’d go about using it. I’m gutted now. They didn’t want much either.
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@Stevie-Wonder they claim to be a Conservative 34hp which would be nice.
I don't think 3k is too bad especially as you see people wanting 3k for an Aprilia
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@Calum 34 would be nice. About the same as a WR200. It’s also worth mentioning that the SDR200 bottom end doesn’t bolt in like the others and I’m not even sure top ends are interchangeable. I couldn’t find any info on here about that
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@Stevie-Wonder Yeah I don't know much about them to be fair. But they look pretty sweet.
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@Calum * just to update what I was saying. I just remembered who it was I was talking to and it was a couple of the TZR Belgarda boys. He says the lower mount of it is all wrong and because of the electrical start it makes the SDR motors very ideal and highly sought after by them as a direct engine swap. Unfortunately not much good for us though
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Yes only the WR / R motors are a direct swap - think the SDR has an extra rear mount but I've never seen one in the flesh for maybe 20 years now.
£3k isn't much I know especially as they wont lose any value
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@Nottsbiker yes it does, it’s what the Belgarda boys where telling me as I had asked if they where using that motor whey they’d never used the 3XP. Also update
I now have a full 4FU. valve head and barrel.
I still have the P but that’ll get sold to fund the 4FU. Unfortunately the guy with the 170 never got back to me so I set my self a challenge of finding a 4FU valve in under a day by the evening.Looking forward to the day I run it and it seizes, nicasil liners and the extra rebuild cost is what initially stopped me going anywhere near I kmx and now here I am
Do you think I’ll sacrifice much reliability with the 4FU? -
@Stevie-Wonder maybe, I really don't like nikasil i appreciate it but it's not something is want to run
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@Calum said in Options, Options, Options but which ones the best?:
Nikasil plating is fine. There is no compromise in reliability? Why would there be?
The tolerances can be made tighter. There is greater heat transfer between the engine and the coolant, meaning you can push the engine harder for longer.
Okay that makes a lot of sense. When you put aside the fact a seize or something could cost you very dearly on paper they actually offer a lot more quality’s. Not to mention the sound lol.
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@Stevie-Wonder it's not that much more expensive is it?
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The only time I've had a DT-R engine go wrong is when I neglected the piston and ran it for too long. The worn piston tried to leave via the exhaust port and made a right old mess as it got caught up.
Even though the bike had done some decent mileage when I took the top end off the piston was still the original one. To make good the damage I had to go 2mm oversize and run a pattern piston just to get some life out of the cylinder.
Moral of the story is that if looked after the engines take a lot of use and should always be rebuilt with genuine / high quality parts when maintenance is required.
I've had 3 RD125lc's when I was younger and poor so have learnt the hard way that cheap piston kits might only cost half what Yamaha charge but only last a quarter of the time
