To me this is an example of one of the disadvantages of using aftermarket parts instead of OEM parts on Japanese motorcycles. I measured a 0.050" offset (left side vs. right side shoulders) on this drive sprocket. This offset causes the sprocket teeth to drag on the insides of the chain links on one side. This drag causes uneven wear on the chain & sprockets and makes a *noticeable* difference in acceleration, deceleration, gear shifting, power transfer, etc, even WITH plenty of chain lube. On a dry chain the situation is MUCH WORSE. The OEM sprocket is clearly marked "OUTSIDE" on one side. This is also shown in the factory manual and in the parts catalog diagram. The aftermarket sprocket (supplied by Volar Motorsport) make *no mention*of this important feature. Volar Motorsport needs improvement.
On Sunday, March 23, 2014 5:42:57 AM UTC-7, Allen wrote: > > That depends on the bike, and who made the sprocket. Most aftermarket > sprockets are flat, if the stock sprocket is keyed with an offset then you > need a washer to keep the alignment correct. JT sprockets will tell you if > that is the case and they make the washers as well. If you look up your > bike it will tell you the part numbers required. I'm glad you figured out > the issue and it wasn't something more serious. Thanks for posting the > resolution. > Sent via BlackBerry by AT&T > ------------------------------ > *From: * Tim Barber <[email protected] <javascript:>> > *Sender: * [email protected] <javascript:> > *Date: *Sun, 23 Mar 2014 02:14:39 -0700 (PDT) > *To: *<[email protected] <javascript:>> > *ReplyTo: * [email protected] <javascript:> > *Subject: *[Nighthawk Lovers] Beware the drive sprocket on a 1998 CB750 > NH fits on the secondary shaft only ONE WAY! > > I just learned this the hard way. I am *lucky* there was not more damage! > The OEM drive sprocket is marked "OUTSIDE" on one side. If you put it on > backwards the (front & rear) sprockets will be misaligned (difficult to > measure) and the chain will bind causing excess drag (draining power and > fuel mileage) and accelerated wear on the chain and sprockets. > On my aftermarket sprocket (15 tooth stock) the part # "VSF1332-15" MUST > face outside (to the left of the engine). > A drive sprocket mounted backwards will cost you power and burn out chains > & sprockets prematurely! > Re: 1998 CB750 NH > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > To post to this group, send email to [email protected]<javascript:> > . > Visit this group at http://groups.google.com/group/nighthawk_lovers. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/nighthawk_lovers. For more options, visit https://groups.google.com/d/optout.
