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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> The Cafe >> ...125cc tunning (what rear tire?) /cgi-bin/YaBB.pl?num=1272292018 Message started by Stimpy on 04/26/10 at 07:26:58 |
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Title: ...125cc tunning (what rear tire?) Post by Stimpy on 04/26/10 at 07:26:58 (need new rear tire) bike is running fine, almost rode on it 1k miles since I bought it and all is just dandy, still want a brighter headlamp but the 45w did make a positive difference but now it needs new rear tire. The other day i almost kissed the road, hard, when the rear tire kept going on a wettish curve (oil patch?) but my old motocross instincts, along w/the low weight of the bike, saved my butt when I kicked the pavement with my inside leg and gave it gas to recover verticality, it worked! :D anyway What size tire you'all think fits a 16" araya rim originally made for a 3.50x16 tire? it has a new D-404 in front so i was thinking of a matching D404 110/90 D16 59 P as well, I want something somewhat wider and a bit round so i can safely curve and lean the bike a bit, cause that original bidgestone 3.50 tire is a joke, just too thin. And yes, there is a good deal of space to put something wider in it, but how wide can the rim take? And can I put a correct size front tire in the rear of this light bike or are the threads and/or rubber compound somewhat different? Cause I cannot a find a dunlop 404 that size designed specifically for the rear. Any ideas? thanx again. -------------------------------------------- So I bought this used 97`yamaha sr125, motor has about 7K miles and is in pretty good shape; great w/gas and insurance. http://img293.imageshack.us/img293/8562/20100424155500i.jpg *larger view: http://img293.imageshack.us/img293/1577/20100424155500.jpg Just tuned it: - fresh oil - sparkplug - new battery - gas & oil filter - new clutch cable - lubed chain & controls - new front dunlop 404 (it`s GREAT!) - smaller rear sprocket (46T / original 49T) ....aanyway, the thing runs fine and goes about 60mph flat (no headwind), 65mph downhill and 45ish up nasty uphills 1) Need passing power, what would YOU do for a bit more torque ? notes: has original exhaust, will "opening" it be counterproductive? will investing in a new one make a big difference/what kind fits? 5th gear is kinda useless except downhill; it has a 22mm? carb and a 102 main jet (choked with a 112, will try a 108 soon). 2) Need auxiliary lamps for night driving notes: it has a mediocre 35/35W old-school bulb, would replacing it with a 45/45W modern bulb damage my CDI? Would (2x) 55W auxiliary lamps (direct battery hook-up?) drain/damage my battery? 3) Carb and airbox are spotless, petcok is fine, but... it starts/runs/accelerates fine BUT it "chokes/gasps" everytime I downrev at highspeeds for a curve and then want to give it gas again, what gives? Thanks in advance, all advice appreciated ;) |
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Title: Re: ...125cc tunning advice / help. Post by justin_o_guy2 on 04/26/10 at 09:11:08 it starts/runs/accelerates fine BUT it "chokes/gasps" everytime I downrev at highspeeds for a curve and then want to give it gas again, what gives? My Savage used to die when Id pull in the clutch & chop throttle at high speeds. I jacked the idle up. IDK what kind of performance you should be getting out of a 125. |
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Title: Re: ...125cc tunning advice / help. Post by Charon on 04/26/10 at 09:27:46 I can tell you what a box-stock 2007 Kawasaki 125 Eliminator does. It will make about 65 mph on flat ground with no wind. That is pushing a Plexifairing 3 windshield, which actually seems to make little or no difference in performance. It seems happier at 55, though. Personally, I would try putting the original sprocket back on and see what happens. You might actually do just a tad better with a larger rear sprocket, say 50 teeth, letting the engine spin faster. Many years ago I had a 175 Bridgestone two-stroker. As I bought it, it would reach top speed in 4th and, maybe, hold that speed in 5th. I put a one-tooth-smaller front sprocket on it, after which it actually went faster than before in 4th and even faster in 5th (according to its speedometer). I no longer remember the actual tooth numbers, but one tooth change in the front sprocket is usually about equivalent to three teeth on the rear. |
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Title: Re: ...125cc tunning advice / help. Post by Stimpy on 04/26/10 at 11:32:45 allrighty then, the bike seems to be mechanically right where it should be, no point of over investing in an unbroken bike that works well as it is to get only minimal results at the end, i mean, one can only push that little piston so far. I`ll focus rather on saving up my money for a new savage and fooling around with the main jet sizes and carb settings (thanx for the tip justin, will rev the idle up a bit), will adjust the valves soonish and will think about replacing the 46T rear with the original 49T sprocket. Look here (pretty handy): www.sprocketcalculator.com ** About the extra headlamp(s), how-to technical instalation advice will be highly appreciated. Anyone else out there with smallish 4-stroke engine experience? |
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Title: Re: ...125cc tunning advice / help. Post by Buckaroo on 04/26/10 at 13:21:08 As far as the headlight situation is concerned. Mount a 4 "D-cell" Maglight to the handlebars. I doubt you the amperage to run a brighter lamp. ;) |
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Title: Re: ...125cc tunning advice / help. Post by mick on 04/26/10 at 13:22:21 It is alot of bike for a 125,it looks almost like a full size bike, steel rims are heavy, there are lots of odds and ends could be taken off I'm sure . Actualy the performance doesn't sound to bad I had only one 125 ,a little BSA Bantam and 55 mph was it, although it was a smoker. 2 stroke. Try a tank full of premium,just for the halabut PS,very nice scenery in the background,I always did like Germany. I was Stationed near "Paderborn" while in the British Army ,do you know it Stimpy? |
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Title: Re: ...125cc tunning advice / help. Post by Stimpy on 04/26/10 at 14:15:53 ;D duct taped maglight on the handlebars, i like it. Maybe a low-wattage, high output LED system, i don`t know but I need more lights; 35W just won`t do through those 15miles of thick beautiful, hilly, curvy forest every evening back from work, tough commute huh? ;) The flywheel specs are the following: (it`s not as weak a system as i tought) - charging output 9A @ 5000 rpm - lighting output 14,5V @ 5000 rpm - battery 12V-7Ah - main fuse 20A - stock headlamp 12V- 35/35W Tomorrow I`ll go to the hardware store to see what i can find, maybe some household 12V led spot lighting? I`ll keep you posted. |
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Title: Re: ...125cc tunning advice / help. Post by Charon on 04/26/10 at 14:42:28 On the flat, weight has almost no effect on top speed. Acceleration, yes, but not top speed. Weight will affect hill-climbing. You might try changing the stock headlight bulb for a 45/45 bulb instead of the stock 35/35. That will draw about one amp more (4 instead of 3). You might have some results by going over all the wiring connections, unplugging and replugging them. That might remove some corrosion. Loosen and retighten both ends of both battery cables, too. Make sure to get the connections hidden inside the headlight shell. It might help to run an extra ground wire from somewhere on the handlebar assembly to somewhere on the frame, but Japanese bikes are reasonably good about not depending on the frame for ground. I seriously doubt you can get any amount of LED lighting which will make an amprovement on the headlight situation. What MIGHT help would be replacing running lights with lower-current LEDs, which would free up a little more current for the larger headlight bulb. |
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Title: Re: ...125cc tunning advice / help. Post by mpescatori on 04/27/10 at 05:23:06 Stimpy, 35W lights are so low power the handlebar switch will be THE switch, no relay. So, if you want to run a better light, go directly for the "Big Brother", 55/60W via a relay (fused). Given the laws of Physics, one 55W "low beam" will provide as much light as two 35W "high beams", and draw a lot less current (fewer amps) BTW, the electrical system you have is pretty much what you find on the Savage, 100W alternator (12V / 8A) so it's a good way to practice working on your next Savage. BTW, I have already found one for you here in Rome, belongs to a journalist I know, 15500 Euro and you have a 5-speed with personalized tank paint (Monument Valley) 8-) |
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Title: Re: ...125cc tunning advice / help. Post by justin_o_guy2 on 04/27/10 at 07:19:47 15500 Euro Seriously? |
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Title: Re: ...125cc tunning advice / help. Post by Stimpy on 04/27/10 at 13:20:48 ...of course €15k euros, it's pimped italian style! ferrari red, lotta bling, all signals made of swarovski crystals, versace accessories, gucci printed leather for the seats, says "mamma" on the tank and smells all over like dolce and gabbana "le male". Thats it, im buying it! fly to rome, pick it up and drive it back through the alps! yeah baby. .............................................................................. Anyway, got a 45/40W replacement bulb so lets see how that works, i was gonna get a 55W but it turns out in my case its illegal over here because of oncoming traffic rules (gotta love those germans), according to my mechanic friend you must use the approved stock configurations at all times and he also told me that bored cops are looking at night for exactly those kind of things to give young bikers a hard time. Ironic since some cars over here have (4x) 55W blinding xenon lamps, plus foglamps but i cannot put the baja 1000 desert lights on my bike that i wanted so i dont kill myself against a dear or wild bore while running through the forest at night, makes sense i guess ::) http://icons.mysitemyway.com/wp-content/gallery/matte-blue-and-white-square-icons-business/thumbs/thumbs_116949-matte-blue-and-white-square-icon-business-gas-pump.pngAnyway, went to the gas station and the numbers are in 70MPG! 8-) (not too bad @ $7.50usd/gal) jeez! Other numbers for this particular bike include: - plates, registration fee and taxes were together about 70euros for 2 years. - 52euros for the government mech, tech & environment b.s. checkup, 2 years. - and full insurance is 62euros a year, so im all set till' 2012 ;) All prices (except plates and checkup) will immediately at least triple when i get a savage, yay! http://www.sip-scootershop.com/EN/Products/Images/bc144734-2de1-43b3-9e0b-528cb985c8b6/Floater+needle+SI+carburetor.jpg ** adjusted the carb (idle rpms) still gasps on curves, im guessing the pendulum (floater inlet needle thingy) is old. http://https://www.hogi99.de/images/produkte/28001137.jpg I'll let you know how the new bulb works, thanks guys!. |
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Title: Re: ...125cc tunning advice / help. Post by justin_o_guy2 on 04/27/10 at 20:51:15 A guy came by today on his 250 Rebel & I asked him about the MPG. He said he got 90 out of it. IDK if thats normal or even possible. |
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Title: Re: ...125cc tunning advice / help. Post by BurnPgh on 04/27/10 at 20:57:19 90mpg is way on the high side but on the rebel forum there was a member who was getting over 100mpg by hypermiling. My usual was 65-70mpg on my '02. My friend Elaina gets about the same on her '86. |
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Title: Re: ...125cc tunning advice / help. Post by justin_o_guy2 on 04/27/10 at 22:11:25 Gotta be Pretty Serious about MPG to worry about getting more than 70. Hypermiling a 250? Daang, thats scrimpin! |
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Title: Re: ...125cc tunning advice / help. Post by Stimpy on 04/28/10 at 02:06:40 on a 250cc/2 cylinder engine?? ...mmmmm Sounds kinda fishy, maybe he has purposely a smaller main jet installed and never rides over 50mph, who knows (are the newer rebels fuel injected or something?). I'm guessing i could maaaybe get 80mpg if i drove like a decent human being, followed the speed limits and let the thing pick up speed on its own, but that's no fun; also currently the bike has a #102 main jet (not sure why), the stock jet is a #108, let's see how the MPG and top speed get affected after i change it back. Thanks again guys. http://img13.imageshack.us/img13/7218/20100406184918.jpg |
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Title: Re: ...125cc tunning (what rear tire?) Post by Stimpy on 05/11/10 at 08:32:06 on it 1k miles since I bought it and all is just dandy, still want a brighter headlamp but the 45w did make a positive difference but now it needs new rear tire. The other day i almost kissed the road, hard, when the rear tire kept going on a wettish curve (oil patch?) but my old motocross instincts, along w/the low weight of the bike, saved my butt when I kicked the pavement with my inside leg and gave it gas to recover verticality, haha, it worked! :D What size tire you'all think fits a 16" araya rim originally made for a 3.50x16 tire? it has a new D-404 in front so i was thinking of a matching D404 110/90 D16 59 P as well, I want something somewhat wider and a bit round so i can safely curve and lean the bike a bit, cause that original bidgestone 3.50 tire is a joke, just too thin. And yes, there is a good deal of space to put something wider in it, but how wide can the rim safely take? Any ideas? And can I put a correct size front tire in the rear of this light bike or are the threads and/or rubber compound somewhat different? cause I cannot a find a dunlop 404 that size designed specifically for the rear. thanx again. |
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Title: Re: ...125cc tunning (what rear tire?) Post by jabman on 05/11/10 at 11:37:29 picking and matching tyres is a pain i went with Metzler tyres on my 125 me33 or something like that, they where brilliant all weather tyres, at the expense of wearing quite quickly. my 125 also had a naff 35w headlight i raised it to a 55w butttttt, the headlight and reflector design make a real difference. i swapped the round side mount 5 3/4" one for a 7" round headlight and fitted a classic cibie 'Z' beam headlight unit and boy was it good. so good in fact i am going to fit it to my savage. and +1 on swapping all the auxiliary lights to led they have alot of power which made the headlight possible |
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Title: Re: ...125cc tunning (what rear tire?) Post by Stimpy on 05/26/10 at 03:09:41 but my key didn't work on the v-max, honest mistake since one can hardly tell'em apart ;) http://img231.imageshack.us/img231/3580/20100524151506.jpg ...BTW: ordered a Contiental 120/80-D16 tire for the rear originally made for maxi-scooters (400cc+), should be arriving any day now, hope it fits. |
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Title: Re: ...125cc tunning (what rear tire?) Post by babyhog on 05/26/10 at 06:29:19 486F72766B621B0 wrote:
Yea, man, I can see the resemblance... ;D |
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Title: Re: ...125cc tunning (what rear tire?) Post by John_D FSO on 05/26/10 at 12:28:09 Yep, anybody coulda made the mistake, perfectly understandable. :D |
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