Basic tuning a DB

DJQuik · 08-18-2007, 07:35 PM

I recently bought a 94 KX125. It rides alright. I drained the gas, put in 80w tranny oil, put in new gas and oil mixture. Im going to install a new FMF fatty pipe with a new pro circut muffler. Also, Im going to throw on a new air filter. Will I have a noticable difference? Will it smoke less? Anything esle I should do? Drain the radiator etc? Also, the throttle cable is loose and when I turn the handle bars it pulls the throttle up and revs high...any ideas? Cable ties? ANY help would be great. Thanks.

wr250f95 · 08-18-2007, 07:50 PM

is the cable routed right? when making modifications, its usually a good idea to re jet!

tigmaster · 08-18-2007, 09:17 PM

ya with a pipe and air filter u will need to re-jet. as far as smoking less, u own a 2 stroke and it is always going to smoke if it is tunned right. with the throttle cable, it is not routed right if it is giving u these symptoms. it is routed real bad if it goes from being real lose to revving the engine. for fluids, i would suggest replacing them all including brake fluid and coolant. any air filters choices, try a twin air or no toil.

wr250f95 · 08-18-2007, 09:42 PM

ya, smoking is just the nature of the beast. go through and replace all fluids, on that old a bike i would check all the lines also and check for damage or cracks. also check your brake pads, chain, and sprockets.

tigmaster · 08-18-2007, 09:55 PM

ya, just look it all over.

wr250f95 · 08-18-2007, 10:13 PM

yep gives somewhere to start.

tigmaster · 08-19-2007, 08:50 AM

thats how i do all my bikes. when i buy one i just go through it and replace everything questionable and then throw in some performance.

wr250f95 · 08-19-2007, 09:06 AM

usually a good idea with used bikes

tigmaster · 08-19-2007, 09:12 AM

ya, i have discovered many things that probably would have destroyed the bike, like a loose clutch basket nut and a crankcase gasket that was pieced back together with gasket maker. or my favorite, the drain plug was jb welded shut. hmmm.... wonder how many times he changed the oil before i got the bike. me and my friend actually had to pick up the bike and turn it upside down and drain the oil through the filler plug. good thing it was my old rm80 and it only weighed like 160lbs.

wr250f95 · 08-19-2007, 02:06 PM

Quote:

Originally Posted by tigmaster

ya, i have discovered many things that probably would have destroyed the bike, like a loose clutch basket nut and a crankcase gasket that was pieced back together with gasket maker. or my favorite, the drain plug was jb welded shut. hmmm.... wonder how many times he changed the oil before i got the bike. me and my friend actually had to pick up the bike and turn it upside down and drain the oil through the filler plug. good thing it was my old rm80 and it only weighed like 160lbs.

160? my ttr weighed around that i think and it was a 4 stroke!

08-18-2007, 07:35 PM	#1 (permalink)
DJQuik C Rider Join Date: Aug 2007 Posts: 31 iTrader: (0)	Basic tuning a DB I recently bought a 94 KX125. It rides alright. I drained the gas, put in 80w tranny oil, put in new gas and oil mixture. Im going to install a new FMF fatty pipe with a new pro circut muffler. Also, Im going to throw on a new air filter. Will I have a noticable difference? Will it smoke less? Anything esle I should do? Drain the radiator etc? Also, the throttle cable is loose and when I turn the handle bars it pulls the throttle up and revs high...any ideas? Cable ties? ANY help would be great. Thanks.

08-18-2007, 07:50 PM	#2 (permalink)
wr250f95 Super Moderator Join Date: May 2007 Location: New Mexico Posts: 7,832 iTrader: (1)	is the cable routed right? when making modifications, its usually a good idea to re jet! __________________ "LIFE'S JOURNEY IS NOT TO ARRIVE AT THE GRAVE SAFELY IN A WELL PRESERVED BODY, BUT RATHER TO SKID IN SIDEWAYS, TOTALLY WORN OUT, SHOUTING'...HOLY S**T... WHAT A RIDE!" this, is why I ride.

08-18-2007, 09:17 PM	#3 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	ya with a pipe and air filter u will need to re-jet. as far as smoking less, u own a 2 stroke and it is always going to smoke if it is tunned right. with the throttle cable, it is not routed right if it is giving u these symptoms. it is routed real bad if it goes from being real lose to revving the engine. for fluids, i would suggest replacing them all including brake fluid and coolant. any air filters choices, try a twin air or no toil. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

08-18-2007, 09:42 PM	#4 (permalink)
wr250f95 Super Moderator Join Date: May 2007 Location: New Mexico Posts: 7,832 iTrader: (1)	ya, smoking is just the nature of the beast. go through and replace all fluids, on that old a bike i would check all the lines also and check for damage or cracks. also check your brake pads, chain, and sprockets. __________________ "LIFE'S JOURNEY IS NOT TO ARRIVE AT THE GRAVE SAFELY IN A WELL PRESERVED BODY, BUT RATHER TO SKID IN SIDEWAYS, TOTALLY WORN OUT, SHOUTING'...HOLY S**T... WHAT A RIDE!" this, is why I ride.

08-18-2007, 09:55 PM	#5 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	ya, just look it all over. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

08-18-2007, 10:13 PM	#6 (permalink)
wr250f95 Super Moderator Join Date: May 2007 Location: New Mexico Posts: 7,832 iTrader: (1)	yep gives somewhere to start. __________________ "LIFE'S JOURNEY IS NOT TO ARRIVE AT THE GRAVE SAFELY IN A WELL PRESERVED BODY, BUT RATHER TO SKID IN SIDEWAYS, TOTALLY WORN OUT, SHOUTING'...HOLY S**T... WHAT A RIDE!" this, is why I ride.

08-19-2007, 08:50 AM	#7 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	thats how i do all my bikes. when i buy one i just go through it and replace everything questionable and then throw in some performance. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

08-19-2007, 09:06 AM	#8 (permalink)
wr250f95 Super Moderator Join Date: May 2007 Location: New Mexico Posts: 7,832 iTrader: (1)	usually a good idea with used bikes __________________ "LIFE'S JOURNEY IS NOT TO ARRIVE AT THE GRAVE SAFELY IN A WELL PRESERVED BODY, BUT RATHER TO SKID IN SIDEWAYS, TOTALLY WORN OUT, SHOUTING'...HOLY S**T... WHAT A RIDE!" this, is why I ride.

08-19-2007, 09:12 AM	#9 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	ya, i have discovered many things that probably would have destroyed the bike, like a loose clutch basket nut and a crankcase gasket that was pieced back together with gasket maker. or my favorite, the drain plug was jb welded shut. hmmm.... wonder how many times he changed the oil before i got the bike. me and my friend actually had to pick up the bike and turn it upside down and drain the oil through the filler plug. good thing it was my old rm80 and it only weighed like 160lbs. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

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