daveh
Full Member
Posts: 417
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Post by daveh on Apr 11, 2023 16:00:34 GMT
What chain drive ratios are folk using on SD250, the standard 41 to 15 tooth or have you changed to a different ratio? If so what benefit or otherwise from a different set up?
Thanks.
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ian
Member Of The Year 2019 
Isle of Man
Posts: 5,408 
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Post by ian on Apr 11, 2023 18:53:51 GMT
When I got my 400NA first & when I got my 250 later I was quite disappointed in the performance. It was only when I rebuild it a few months later I realised the gearing had been increased. I can't remember the sprocket sizes, but when I fitted the correct ones it was much nicer to ride one the hilly roads around here. More recently, when I started using it for trips away & ended up riding down a few straight 60mph A roads, I went up a tooth on the front sprocket, which dropped the revs a bit at a steady 50 or 60mph on these roads, but didn't seem to effect performance on hilly country lanes.
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daveh
Full Member
Posts: 417
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Post by daveh on Apr 11, 2023 21:26:47 GMT
When I got my 400NA first & when I got my 250 later I was quite disappointed in the performance. It was only when I rebuild it a few months later I realised the gearing had been increased. I can't remember the sprocket sizes, but when I fitted the correct ones it was much nicer to ride one the hilly roads around here. More recently, when I started using it for trips away & ended up riding down a few straight 60mph A roads, I went up a tooth on the front sprocket, which dropped the revs a bit at a steady 50 or 60mph on these roads, but didn't seem to effect performance on hilly country lanes. Thanks Ian. That's useful info. |
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