djackbanshee Posted June 19, 2007 Report Posted June 19, 2007 Why are they better than stock . I heard they make the main bearings more reliable ? Do i absolutely need them or will Stock work out ? Thanks Quote
theshee Posted June 19, 2007 Report Posted June 19, 2007 They are better then stock because they put less strain on the crank bearings. The angles gear pulls and puts un needed pressure on that sides crank bearing and wears it out quicker. I would not run a angled gear on my cub. I like straight cuts. My little stock bike will get them when I get inside the motor for sure. Quote
FireHead Posted June 19, 2007 Report Posted June 19, 2007 Why are they better than stock . I heard they make the main bearings more reliable ? Do i absolutely need them or will Stock work out ? Thanks This really isn't a question of why is which one better, but it is a question of which is more appropriate for a given application. If you are making more than 100hp, then straight (involute tooth) gears are probably worth while as they offer less resistance and torsional load to their repective shafts. However, straight (involute tooth) gears generally hve more backlash, wear faster, and are much louder than helical tooth gears. If you don't drag race, make 100hp or more, or thing it's fun to make gears yourself, you don't need straight cut gears. Go over to PS and they will tell you that all bikes should have them and if you don't immediately spend $1k on them you are a loser......................, but then again that is Planet Sand and it's full of idiots with credit cards (which includes me). :geek: Quote
375hp banshees Posted June 19, 2007 Report Posted June 19, 2007 This really isn't a question of why is which one better, but it is a question of which is more appropriate for a given application. If you are making more than 100hp, then straight (involute tooth) gears are probably worth while as they offer less resistance and torsional load to their repective shafts. However, straight (involute tooth) gears generally hve more backlash, wear faster, and are much louder than helical tooth gears. If you don't drag race, make 100hp or more, or thing it's fun to make gears yourself, you don't need straight cut gears. Go over to PS and they will tell you that all bikes should have them and if you don't immediately spend $1k on them you are a loser......................, but then again that is Planet Sand and it's full of idiots with credit cards (which includes me). :geek: break that sucker out & buy those drag arms already :geek: Quote
blowit Posted June 19, 2007 Report Posted June 19, 2007 I think fire guy got it covered. The helical gears (stockers) are smoother and quieter though they do induce more axial loading on the main bearings which are primarily designed for radial loads. Unless you are making big power, the stock gears can last you a lifetime and offer very acceptable main bearing life as well. Ever heard a gear drive cam in a V8? Brandon Quote
FireHead Posted June 19, 2007 Report Posted June 19, 2007 break that sucker out & buy those drag arms already :geek: I am working on it, sort of. I am actually stuck in Las Vegas on business for three weeks, hence, my parts buying ability is slightly hampered. Quote
FireHead Posted June 19, 2007 Report Posted June 19, 2007 I think fire guy got it covered. The helical gears (stockers) are smoother and quieter though they do induce more axial loading on the main bearings which are primarily designed for radial loads. Unless you are making big power, the stock gears can last you a lifetime and offer very acceptable main bearing life as well. Ever heard a gear drive cam in a V8? Brandon Some people like gear "whine," but I don't know why. Quote
bones Posted June 19, 2007 Report Posted June 19, 2007 Ever heard a gear drive cam in a V8? Brandon Music to my ears :biggrin: Quote
majicmike Posted June 19, 2007 Report Posted June 19, 2007 Ever heard a gear drive cam in a V8? nope Quote
majicmike Posted June 19, 2007 Report Posted June 19, 2007 Why are they better than stock . I heard they make the main bearings more reliable ? Do i absolutely need them or will Stock work out ? Thanks If it is for your cranker it is an absolute. the sraights are alittle more forgiving and atleast on mine the gears dont line up quite right. Quote
djackbanshee Posted June 20, 2007 Author Report Posted June 20, 2007 Ok thanks that exactlt what i wanted to know !! Quote
FireHead Posted June 20, 2007 Report Posted June 20, 2007 If it is for your cranker it is an absolute. the sraights are alittle more forgiving and atleast on mine the gears dont line up quite right. ..............kick the machinist in the bean bag if your gears don't line up correctly? :biggrin: Quote
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