Bluemotion
Member
- Messages
- 362
- Location
- Holmfirth
I never even knew which bike it was on but I’m guessing a GS but which one? The progress report sounds exiting and successful. Where do you stand legally as I can see it’s a very grey area? I’ve also had a fascination for space savers. They look like ‘free’ tyres for life in a fashionToday was the test.
One thing after another got in the way, but today I took it out to test three things
1. The new needle in the SU
2. The Delkovic silencer
3. The Darkside tyre.
It all went well; after a few miles scrubbing it in I gradually started to give it a bit more welly and to be honest it felt no different from any decent tyre I've had on the bike. It actually felt so much better than the several crap tyres I've had, but that's not a surprise. A lot of people say they can feel the transition as it leans - ie, leaves the totally flat tread area and moves to the more side-ely half (not the edge, nor the sidewall, as the ignorant insist), but I can't say I felt that, and by the time I returned I was giving it a fair bit of stick in the backroads around here. However, to break it in and give me a starting point, I was using 40psi, which probably isn't its optimum. 40psi was likely crowning it a bit, so I'll drop it by a couple of pounds per go and see where the sweet spot is.
The needle in the carb performed adequately and it's now revving out pretty much as hoped, and not leaning out at the top end - still got another needle to try. I wasn't paying all that much attention to the AFR gauge as I should have been, as I was more focused on the road and possible bad manners.
I will say this though, the 15" rear that's now on it has increased engine revs in gear by about 8% (according to the online tyre calcs) and it's really noticeable how much better it goes now (aided by the carb breathing better). With the difference in gearing and the better breathing, it goes like a rat up a drainpipe and that Delkovic sounds lovely but it's too loud. I had the H-D silencer molished to the point it sounded nice, but wasn't too noisy. I wonder if there's any baffling material in the Delko end piece. If not, I can add some, and perhaps molish a Supertrapp-like end for it.
Still, the character of the bike has changed. It's now sitting at 6K @ 70mph and it feels quite busy. I'd rather have different gearing, but none of the GS line of final drives offer any swappable units to achieve that, and I don't fancy messing around changing the secondary drive bevels - too much faff and opportunity to royally screw it up.
I'll continue with this tyre for a while yet and get used to it. I might get a Michelin-X 5.50 R 16 which will just about fit into the swingarm and I have a spare 16" GS wheel there doing nothing at the moment. That will put the overall gearing just about right where it should be. Bloody expensive tyre, though.