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Old 11-21-2006, 02:18 PM   #1
walkingbear OP
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Dr 350

does anyone know if a DR 400 motor will fit in a DR 350 (90) frame?
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Old 11-21-2006, 02:42 PM   #2
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everything is possible. But not as a straight swap. Totally different beast.
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Old 11-21-2006, 03:40 PM   #3
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No, DR350 is a dry sump, oil cooled bike and the DRZ motor is not. There is no reason to do this swap anyway as the DR350 frame and suspension isn't even up to handling a good stout DR350 motor. You are flirting with what would be a ton and a half of work going backwards. Just power up the DR350 with a cam big bore and a flatslide carb and some minor porting and itll be as fast as a DRZ400 is stock anyway.
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Old 11-21-2006, 05:28 PM   #4
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problem

here is the problem, purchased a sitter.. clean the carb, changed the oil,
new plug, new air cleaner .. no spark or compression.
WHAT SHOULD I LOOK FOR NEXT?
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Old 11-22-2006, 10:30 AM   #5
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No compression could be the fact that the rings are dry. Try squirting a little oil into the cylinder. If the rings are shot, then it's tear-down time. No spark could be a few things. CDI box, bad plug, bad plug wire, etc. Electrical gremlins are the worst. Check out the Maximum Suzuki forums. They're DR specific and you'll most likely be able to search for (and find) the resolution.

Good Luck - Dave.
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Old 11-22-2006, 11:20 AM   #6
patsymack
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Walkingbear,
You might want to check the compression release to make sure its not holding a valve open that could be the cause of low compression.As far as spark I have no clue .Hth
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Old 11-22-2006, 12:06 PM   #7
Sniper X
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Lack of spark on a DR can be these three things, ok 4. Bad CDI, kick stand kill switch, clutch kill switch, or the starter relay. On Suzukis, the starter relay (if it is an ele start model) causes the bike to not have spark if it has gone bad. Id check the kill switches first. Is thsi a DR350, or a DR350S or SE? Need 2 know more to help!
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Old 11-22-2006, 12:13 PM   #8
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A flat battery will cause a no-spark situtation as well, even on the kick start models.


Also note that checking compression is tricky on the SE models due to the auto decomp mechanism. It will probably read around 80-100psi if you just stick a compression gauge in it and crank it over because one of the exahust valves will be held partially open.

good luck
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Old 11-22-2006, 12:58 PM   #9
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What model are wee talkin here?

Plus, if we KNEW WHAT MODEL it is maybe we could get a little more informative??!! If it is electric start, DR350SE, then turn on the key, make sure you have juice ala light, from the headlight, then if so, the solinoid is under the seat, jump it and see if the motor turns over. If so, it is either the safety switches, the key switch, or the relay....
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Old 11-22-2006, 02:25 PM   #10
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He says its a 90 so I assume its a kicker.
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Old 11-23-2006, 09:20 AM   #11
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Quote:
Originally Posted by Sniper X
No, DR350 is a dry sump, oil cooled bike and the DRZ motor is not. There is no reason to do this swap anyway as the DR350 frame and suspension isn't even up to handling a good stout DR350 motor. You are flirting with what would be a ton and a half of work going backwards. Just power up the DR350 with a cam big bore and a flatslide carb and some minor porting and itll be as fast as a DRZ400 is stock anyway.
my (91) dr350 is definately not oil cooled.
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