Author Topic: 85 xl 350 /83 xr 350  (Read 1118 times)

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Offline Scuberdiver

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85 xl 350 /83 xr 350
« on: April 10, 2017, 09:25:50 PM »
Can any honda experts tell the difference between these two motors i just picked up a 85 xl350 to put the motor into my 83 xr 350 frame The cams would have to be different what about the crank and carbys the xl 350 runs very well no noises or rattles or smoke Looks like a direct transplant into the xr frame has any one done this before  any advise would be great thanks   

Offline Honda Hoarder

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Re: 85 xl 350 /83 xr 350
« Reply #1 on: April 11, 2017, 08:19:22 PM »
Are the main crank case gaskets the same ? Can be a quick way to check

Offline Scuberdiver

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Re: 85 xl 350 /83 xr 350
« Reply #2 on: April 11, 2017, 08:29:00 PM »
i read some were that the 1985 xl 350 mtor  is a 83/84 xr 350 motor with   twin carbys
« Last Edit: May 08, 2017, 06:29:47 PM by Scuberdiver »

Offline SUZUKI311

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Re: 85 xl 350 /83 xr 350
« Reply #3 on: April 12, 2017, 07:12:18 PM »
just rebuilding a XR350 86 for a mate, and the gaskets from both motors supercede to the same number, as does the cam.
1977 RM80B-UNDER CONSTRUCTION-(Still after 11 years !) 2017 KTM 350EXCF , 96 CBR600, . Member of Bendigo Motorcycle club since 1981, Viper No. 311 (old VMBA Number!!)

Offline ghostdancing

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Re: 85 xl 350 /83 xr 350
« Reply #4 on: April 14, 2017, 03:51:47 AM »
i have experience on the same matter but for the XL600\XR600.. i guess the XL350 has a larger magneto\flywheel (higher currect output to manage the battery\full road lighting equipment).. that's why an XR motor would rev quicker to higher rpms

carburetor can be the same, but probably different jetting (the XR has larger air box, the XL has a battery there, so smaller box)

you can easily check the difference on the CMNSL.COM site: will find there the microfiches \ parts numebrs for any japan vintage bke

Offline Scuberdiver

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Re: 85 xl 350 /83 xr 350
« Reply #5 on: April 18, 2017, 07:23:45 PM »
yep bigger flywheel iam  going use the carbys of the xl 350 with the motor to put  in my xr 350 roller  while i rebuild  the  old  xr 350 motor  just the wires are different coming out of the stator so not sure
« Last Edit: May 08, 2017, 06:32:44 PM by Scuberdiver »

Offline Scuberdiver

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Re: 85 xl 350 /83 xr 350
« Reply #6 on: May 07, 2017, 08:33:41 PM »
 have put the xl 350 motor in the xr frame the wires from the stator are diffrent 5 wires on the xl and 3 from the xr so can anyone tell me if a 83/84 xr350 stator will fit a 85 xl 350 duel carby motor thanks

Offline ghostdancing

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Re: 85 xl 350 /83 xr 350
« Reply #7 on: May 08, 2017, 04:36:24 PM »
they are different because XL's motors have a battery charge circuit and XR's do not

i would  try to fit XR stator + magneto flywheel + wiring on the XL motor

Offline Scuberdiver

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Re: 85 xl 350 /83 xr 350
« Reply #8 on: May 08, 2017, 05:41:27 PM »
yeah i was thinking about the fly wheel as well will have  to pull it apart and give it a go was thinking just cut and shut the wires  coming out the stator on the xl 350 to suit the xr 350 wiring loom but not sure on this idea
« Last Edit: May 08, 2017, 06:35:14 PM by Scuberdiver »

Offline Scuberdiver

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Re: 85 xl 350 /83 xr 350
« Reply #9 on: May 08, 2017, 06:26:29 PM »
Just been on the Cmnsl site Ghostdancing  looked at part numbers  the xl 350 stator 31120kg0004  flywheel 31110kg0008
                                                                                                                 xr 350 sttor 31120kf0004 flywheel 3110kf0004
not sure looks like they might be kfo is the xr 350 code for all its parts and kg must be the xl code just one number different on the fly wheels will pull motors apart and see  unless some can enlighten me on this  thanks
« Last Edit: May 08, 2017, 06:28:10 PM by Scuberdiver »

Offline ghostdancing

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Re: 85 xl 350 /83 xr 350
« Reply #10 on: May 09, 2017, 08:51:27 PM »
try to see if the crank assembly are the same for both XR\XL.. if yes, there should be no problem to mount the XR flywheel on the XL crank also check if the stators XR\XL have the same mounting holes pattern.

i guess both stators have 2 coils\circuits: 1 is for ignition  and 1 for lights and other stuff;  this one,  on the XL  goes to battery charging circuit, on the XR there is only a capacitor instead of the battery

the headlight (if i remember well) should be AC current in both series XR\XL, while the minor electrical stuff are DC current (at least on XL)

probably you can drive the XR wiring with the Xl alternator (stator+ magneto flywheel assembly), but must study well how the whole thing works.

note also that the ignition black box should be different (more advanced \ different curve) on XR

also: different marketed XR s came with different electricals: for example australian market XR have blinkers, italian market XR600 had a bigger headlight, with more coils in the stator to drive it (it was road legal, but no blinkers fitted..)

Offline Scuberdiver

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Re: 85 xl 350 /83 xr 350
« Reply #11 on: May 10, 2017, 03:59:03 PM »
Have pulled both stators out and the xr stator bolts straight in the xl motor dont have a fly wheel puller so was thinking just change the stators over then the wires match up with the xr wiring loom
« Last Edit: May 10, 2017, 04:01:50 PM by Scuberdiver »

Offline ghostdancing

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Re: 85 xl 350 /83 xr 350
« Reply #12 on: May 10, 2017, 04:49:21 PM »
note that XR flywheel it's lighter: no HP gain but faster revving motor with it.. so i would have the puller and go with it; also: i guess magneto are different: probably XL wheel has stronger magneto field to match the more powerful stator coils.. if so, the mix XR stator coils + Xl magneto wheel will produce different currents at the wires..

Offline Scuberdiver

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Re: 85 xl 350 /83 xr 350
« Reply #13 on: May 11, 2017, 06:07:26 PM »
hope to get flywheel of this weekend and see if it fits then get it back together using the xr stator and flywheel fingers cross

Offline Scuberdiver

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Re: 85 xl 350 /83 xr 350
« Reply #14 on: May 12, 2017, 06:50:20 PM »
not sure about the cranks xr 350 13000kfo000
                                          xl 350 13000kv901
have to try the fly wheels out over the weekend

Offline ghostdancing

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Re: 85 xl 350 /83 xr 350
« Reply #15 on: May 12, 2017, 08:23:40 PM »
dont now the 350 motor.. but in the 600 RFVC motors, the only difference with the cranks XR\XL it's the balancer gear: the XL has "elastic" gear system (smoother @low revs), the XR has normal "rigid" gears coupling.. so you can mount the XR crank in the XL cases, but must match it with the XR's balancer  probably the 350s have a similar setup

Offline Scuberdiver

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Re: 85 xl 350 /83 xr 350
« Reply #16 on: May 18, 2017, 07:09:59 PM »
OK motor is in after many phone call and hrs on the computer i took both stators to a bike lec  here in adelaide this guy knows  his stuff  can run ether stator in the bike