Grand Prix 250
Main Motorcycle: Street Twin
Join Date: Oct 2011
Location: Cnx Thailand
Other Motorcycle: Striple 765 18 model
Extra Motorcycle: 2018 Tiger XR 800
Recently had the Tec stick with lumps (cam) fitted to my 2018 Street.
Previously the bike had a mapping change by the dealer when the bike was new as i had the X pipe fitted at pre delivery. By dyno that was running rich across the rev range, dyno at a much later date.
Then i fitted Remus pipes, running without the baffles, then the dyno said that it was lean with slightly more torque but no change in HP. Fitted a BoosterPlug and seemed to fix it, the leanness and reduced the throttle roll off cackle? But no dyno run to confirm this.
Also have K&N filter installed.
After the debacle with the German cam, and heaps of stress and a return of the cam, I ordered the Tec cam.
All I can say is wow what a difference it makes. Probably only got about 500Ks on the new cam and had it fitted at the 10K kilometer servicing. Bike pulls better throughout the entire range above low end torque, possibly a tiny drop from the bottom but I also removed the snorkel at cam fitment, but wrapped in how much better it goes. Used to sort of slow down in acceleration around 120kph (top gear) now easily pulls to 140 and still feels like it will keep going but giving it a bit of a run in before I go balls to the wall/full loud.
As it doesn’t go asthmatic I am holding for longer in 2nd gear corners where as previously I would change up to third as it was running out of oomph although it really was a 2nd gear corner for my thinking and riding style. Now these definitely are 2nd gear corners.
I feel there is real need now to change the gearing to taller with the extra grunt, was thinking of 2 less teeth on the rear but it may be easier for me to get 1 more tooth on the front where I am situated.
Have access to a power commander and am wondering if it is worth going to the hassle of getting that sorted, a map then fine tuning on the dyno.
Currently, BoosterPlug, X pipe, Remus straight thru pipes, snorkel removed, K&N filter and the additional box thingy in the intake side with vacuum lines going to it, fitted here in Thailand, removed.
After fitting the cam and removing the snorkel there is a lot more burbling happening on throttle roll off than previous so maybe the BoosterPlug can’t fully adjust for the cam and all of the other mods. If I decide to fit the power commander will do a pre and post PC run to check on fuel air ratios, Tq and HP also, in the current configuration.
If I do another dyno will get the previous run sheets for comparison.
Am I missing something about people quoting exact RPMs from the street, are people using smart phone ap or an after market tacho?
Am keen to hear from anyone who had one of the 900 liquid cooled engines, Twin or Scrambler, with a cam fitted and then moved onto the Speed to get their opinion on the actual difference in real world feel. There is no substitute for cubes and another 300cc’s must make a difference and then of course there is that 6th gear and twin disc brakes.
Have a few reservations regarding the Speed over the Street, considerable loss selling Street to get Speed and seat height is real issue for me at 155cm/5’2” ish. Additionally i have a 765 for speed and high end brakes and suspension. Would love the extra cubes in the 1200 and the 6 speed box, tacho and twin 4 pot discs but the price difference at the moment is something i don’t think i could live with, maybe if a demo comes up at the right price or after a year or so there should be some low ks SH bikes floating around where some other poor bugger has worn that big initial loss.