alrick
Velociraptor
Posts: 27 
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Post by alrick on May 19, 2015 12:38:56 GMT
Can any one tell me what revs they are doing at 70, I want to check my instruments calibrated ok
Cheers
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Post by buggerlugs on May 19, 2015 15:12:37 GMT
Depends what gearing you have....
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alrick
Velociraptor
Posts: 27
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Post by alrick on May 19, 2015 16:26:02 GMT
I'll check but I'm about 4000 rpm unless it's set wrong
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antiks
Velociraptor
If it's got tits or tyre's it'll cause you trouble
Posts: 27
Bikes: 1999 Suzuki GSF Bandit 1200 & 1993 GSXR 750
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Post by antiks on May 19, 2015 16:27:01 GMT
Sounds about right for a standard mk1 1200
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Post by oilyspanner on May 19, 2015 16:33:25 GMT
As above, it does depend on whether the bike's on std gearing or not - if it's std with a fairly new 180 rear tyre each 1000 revs gives you 17 - 17.2 mph true speed (allows for a bit of tyre wear). The internals ratios are the same as the 1127 R's and I worked out a load of possible sprocket's combinations, so I had it listed.. . I should get out more !
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Post by katana on May 19, 2015 17:29:26 GMT
So you are comparing your indicated road speed against your indicated tacho revs to check accuracy. Both of which can be badly inaccurate - the tachos are known to be up to 1000rpm out + or -
Best ride with someone who has a GPS with speed read out if you really need to know!
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alrick
Velociraptor
Posts: 27
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Post by alrick on May 19, 2015 18:26:13 GMT
The speed is calibrated by the tyre size, it's a moto gadget clock set, the revs are by the cdi/coils so have some options when setting the parameters . pretty happy it's rite. It's a 190 tyre. I think the speed is rite just seemed quite high revs for a 1200 cc @ 70mph
What should red line be safely set at?
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Post by jonny1bump on May 19, 2015 20:40:52 GMT
Stick tom tom on it to check, or on dyno.
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Post by kokolis on May 20, 2015 5:29:56 GMT
Dyno speeds are also estimation
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Post by oilyspanner on May 20, 2015 7:48:11 GMT
The ecu/cdi sets the rev limit, unless you have a programmable item, Dyna 2000 or such. If the clock you have has a red light to warn you to change up, then 10k ish would be good - depends what cams and head work you have ? Gearing is a personal taste which can be altered easily - unless you are going for best acceleration or top speed, then there will be gearing that is best to achieve that  |
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Post by jonny1bump on May 20, 2015 20:18:28 GMT
Dyno speeds are also estimation They dam good estimation and more accurate then you think. |
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Post by boilerdude on May 21, 2015 1:31:56 GMT
mine was turning somewhere in the ballpark of 8 or 9000 rpm at 150 mph. cut that in half. you get around 4,000 - 4,500 at 75 or so. funny i never payed attention at the half. But i can damn sure tell you approximately what the wound out numbers were.
stock gearing.
bridgestone bt-016s at stock sizes.
it had more 5th gear left but really didn't want to pull it much more through all that wind (mine is an N, totally naked)
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Post by kokolis on May 21, 2015 5:31:10 GMT
Dyno speeds are also estimation They dam good estimation and more accurate then you think. In a tunnel, with no wind, maybe, real is only on the road m8, many aspects play a part for top speed and you dont find them on any dyno even manufactures have big difficalty to simulate that. That explains speeds of 290 on that....what? Yeah right |
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Post by wsn03 on May 21, 2015 8:34:59 GMT
They do run out of gears quickly - I bought mine new and couldn't get on with it, was gutted until someone suggested going up a tooth up on the front sprocket......fantastic, it's lazier and just better all round for mid range touring.
This gearbox calculator shows 5mph difference at 4000 rpm in top gear, it does make a big difference.
You will need to slightly file out a little space in the sprocket cover to make the larger tooth fit, where it interferes with a bolt channel - easy mod, takes a couple of minutes.
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Post by wsn03 on May 21, 2015 8:38:09 GMT
I'll check but I'm about 4000 rpm unless it's set wrong Check out this site - enter Bandit 2000 - 2002 as an example and see the difference when you change the sprockets www.gearingcommander.com/ |
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