Me and my brother when out riding the other day. when we were coming down to stop sigh at the bottom of the hill, I rev match down shifted from third to second gear going around 35 to 40 mph. I hit the down shift flawlessly and began to engine break all the way down to the stop sign. during this time my engine seam to give off a high pitch hum from the high RPM ( i do not have tac on the bike so i don't know how high the rev were). apparently the hum was even loader behind me was my brother informed me after the ride. he said i did down shift at too high of a speed, and that i could damage the engine by doing that. what is your opinion?
damage yor engine? NOT.. yor motor is a big air pump. cept we put fuel in it and some sparks.. its bilt to handle the load going up and/or down.. you wont hurt yor motor, its capable of spinning that fast under accelerating load. deceleration is nada problem.
where you are pushing the boundaries is that the tires mite not want to slow quite that fast and you could loose some bite in the road, aka skid = not good.
So when using your engine to brake, its best to roll off the throttle and step it down one gear at a time shedding speed incrementaly. going down steep grades this is the proper method to remain in a lower gear and just let the motor w/ throttle off control the speed below posted numbers. If you need to apply brakes to slow then down shift to yet another lower gear and let the motor keep yor speed in check.. the motor can handle the rpms just fine. it will not hurt it. poncho
not another boring list of mods;
14 guzzi v14, 14 Injun chieftain v18, 13 guzzi v7, 12 hardley 48
07 kaw v2k, 07 guzzi v11, 07 yam v17, 07 96ci 'lectraglide
06 88ci superglide, 05 hardley 883, 05 yam v17
04 zooki sv1k, 03 guzzi v11, 02 kaw v15
01 Honda 750, 00 hardley 883, 84 Honda v7 supermagna, 99 hardley 883
92 zooki v8 sport, 88 zooki 650 thumper, 84 Honda 500 thumper
80 Honda 360t, 78 Honda cb500f, 75 Honda cb750f
73 Honda cb500f, 73 Yam TX750 blow up bike, 72 Honda cb350t