Quote:
Originally Posted by
alexander_oneill
I'm trying to get my ideal bike, and the Tenere is definitely the blue-print for one. I love the off road ability. I used to race sports bike a lot on track and found that end cans even with a power commander don't give a huge amount (5bhp max), you need a full system, but i can't find anywhere that does racing downpipes along with cans.
I have been looking at the engine work off the road.de do. It looks like �1000 there would get 15-20bhp on the bike. My theoretical aim is to reduce the vibes at 80mph through gearing (3 off rear maybe 1 on front too) then compensate for the gearing with power mods. That should make the Tenere great in the mud and great for 8hr stints on the motorway to far flung places (i'm planning Iceland in June 2013 via orkney, shetland and faroe islands).
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By all means go for it! but I don't think you'll really get what you are after... to get an extra 15-20 bhp, you'd be looking at major valve work, and quite possibly a big bore too (the US guys can get 75bhp out of the 700cc Raptor engine, or so they say), and chasing max bhp is not the way to go on a bike like this... a consistant 5bhp across the mid range would be far more useful in the real world.
Personally I don't believe you need to change the header either [unless you do it along with the valve and piston work] - the stock Tenere header is already a pretty big bore, and a nice straight/short run compared the underslung pipes on the 600R of course...
Also, rising the gearing as much as you suggest is going to make it appalling off-road! - no amount of power is going to readdress that - in fact all you're likely to end up with a burnt-out clutch...
The bottom line is a long-stroke single cylinder engine running at 6000+ rpm (to get 80mph) is going to be vibey compared to a twin or multi-cylinder engine... I feel you're either going to have to get used to it (no bad thing, I think they call it 'character' in the brochures don't they?!), buy a KTM 690 (which by all accounts is very smooth at high revs), or a twin of some sort?
Value for money wise, the DNA stage 2 / PCV and some sort of single pipe is going to give you the best improvement for the least outlay - anything more and you'll either by spending huge ���s for a minimal increase, and ultimately be compromising the reliability and economy of the bike for travel...
Jx