58x110 crank advice. Your thoughts please.

[speedy]

Got a friend whos crank gave way at Whitby, well en route that is. He had recently fitted it and it was a used crank to be fair which was SIL webs with a 110mm Yam rod and welded pin. The weld gave way and also the web cracked down to the centre. He is now wary of using SIL webs as he's been told that they are made of soft metal or suchlike. Now I personally have never used anything other that SIL webs and 107mm rod kits and never had an issue on any TS1 set up that I've ever had. He wants the 110mm rod as he believes that the longer rod is surposed to give a smoother engine, something I too am led to believe, but cannot confirm. He is looking at having a crank built with MEC webs and a Yam 110mm rod, not welded as he's been told these webs are stronger than the SIL ones. Does any of this sound true or logical to anyone? Cheers, Speedy.

[mickjr]

http://www.bgm-tuning.com/product-categ ... rankshaft/

[speedy]

Yeah that is what he was really after, but there is a shortage of BGM webs apparently, so he canna get one of them at present and kind of needs a crank yesterday.cheers,Speedy.

[mickjr]

http://www.lambrettaspares.com/spares/b ... m0252.html

[coaster]

I had a SIL crank that I was going to have a Yambits 110 rod fitted to. I took it to CS Engineering but also took a used 58x107 Mec Eur crank as well as there was some slight damage to one of the SIL webs. Chis Sadd (owner) was of the opinion that SIL webs were fine but then noticed that the drive side bolt thread had been buggered by being hit with a hammer during removal (not me, it was in a box of bits ). Therefore, it was necessary to use the MEC as the donor. Net result was that the MEC webs were fine, the PIN needed the required pressure to fit and there was enough room to fit the big end shims that came with the big end kit. Not done too many miles on it yet (maybe 200) but it seems fine.

[speedy]

http://www.lambrettaspares.com/spares/b ... m0252.html

Yes just looked and temporarily out of stock as are many things on the MB site currently. He did put a notify me on there a few weeks ago,before he had to fit the one that's just failed, but no reply yet, thanks for help though.Speedy.

[speedy]

I had a SIL crank that I was going to have a Yambits 110 rod fitted to. I took it to CS Engineering but also took a used 58x107 Mec Eur crank as well as there was some slight damage to one of the SIL webs. Chis Sadd (owner) was of the opinion that SIL webs were fine but then noticed that the drive side bolt thread had been buggered by being hit with a hammer during removal (not me, it was in a box of bits ). Therefore, it was necessary to use the MEC as the donor. Net result was that the MEC webs were fine, the PIN needed the required pressure to fit and there was enough room to fit the big end shims that came with the big end kit. Not done too many miles on it yet (maybe 200) but it seems fine.

Cheers Coaster, that should be fine for him then me thinks. He has just become a little wary to it happening again with SIL webs, yet as I've said, they are the webs I've always used without issue. Think the real issue was that it was a used crank he put in......And I've given him loads of earache about when ''NOT'' to be a super scrimper. Not sure what the theory is about the longer rod making for a smoother engine?

[gaz_powell]

I have sil webs in all my 2 road going ts motors i)107 af race rod kit ii)mazz 107 rod with af bearing

Non are welded and no problems

New ts motor has sil webs and 115 yam rod - yet to be ran in my new S2 (just got paintwork back)

Just had a spare built for the shelf with mazz rod and af bearing

If the crank was used was it thoroughly checked before it went in ?

Get another with SIL webs and yam rod built by someone who knows what they are doing - all brand new then you know what you've got

[speedy]

Eh up Gaz,was nice to see yer in Whitby, if only briefly, so we still gotta catch up for a beer . Regards the crank, I think he's just become paranoid without good reason, as I've always been of the opinion that SIL are probably the least likely to twist. The crank he bought was off a very reputable dealer, but they messed him about after he ordered a BGM with Yam rod. First they hadn't got any rods in stock, then they couldn't get hold of any webs. At this point I'd personally of found another dealer, but alas, they offered him a crank that had come out of one of their race bikes, but guaranteed it. I wouldn't of touched it with a barge pole in all honesty. When he rang em though, they were genuinely upset and did offer to replace it with something else and replace anything that it had damaged, even an offer of a free rebuild, so fair play to them for that gesture. So he's now having the MEC with Yam rod and not welded this time,cheers,Speedy.