Welcome, Guest. Please Login or Register

Author Topic: DRZ 400 Sprocket ratios  (Read 459 times)

0 Members and 1 Guest are viewing this topic.

Offline Gary M

  • Newbie
  • Bike: Suzuki DR-Z 400
    Location: Kwazulu Natal
  • Posts: 7
DRZ 400 Sprocket ratios
« on: October 31, 2011, 08:57:15 am »
Hi Guys, new to this so please forgive me if I get it wrong. Just bought a DRZ400S and leaving Thursday to cruise up to Zambia on a 2 week holiday. My mate bought one last week as well so should be able to share spares etc. I've currently got a 15 / 49 ratio on the sprockets and was wondering if anyone had recommendations as to what is an optimal ratio for a long trip like this? Don't want to wring the poor bike's neck in keeping it at 100- 110km...
Thanks so much
Gary
PS: Anyone know if the Magadigadi pans are dry at the moment? keen to camp out in the middle for a night
 

Offline Operator

  • is a Forum Vendor and a
  • Forum Whore
  • ****
  • Bike: Husqvarna (all models)
    Location: Western Cape
  • Posts: 5,590
  • Thanked: 157 times
  • Official Vendor
    • Vendor
Re: DRZ 400 Sprocket ratios
« Reply #1 on: October 31, 2011, 09:16:34 am »
Just phone a Suzuki dealer and ask to make sure, but I think the S-model comes
standard with a 15 - 44 combo.

On a long trip like this, I would drop about 3 teeth at the back.
It would stress your engine less on long stretches and cruising at
115 km/h would be OK on the engine
 

Offline Stevie

Re: DRZ 400 Sprocket ratios
« Reply #2 on: October 31, 2011, 09:28:19 am »
For comparison

Gear Ratio

Full Gear Ratio Chart (pdf)
Teeth      13       14       15
39         3.00   2.79   2.60
41         3.15   2.93   2.73
43         3.31   3.07   2.87
44         3.38   3.14   2.93
46         3.54   3.29   3.07
47         3.62   3.36   3.13
48         3.69   3.43   3.20
49         3.77   3.50   3.27
50         3.85   3.57   3.33
51         3.92   3.64   3.40
52         4.00   3.71   3.47
53         4.08   3.79   3.53

If you drop to a 43 or 44 on the rear you should be able to drop revs on the open road, definitely will not be as perky on the tight stuff or acceleration.
I dropped from a 41 to a 39 on the DR350 - runs about 500rpm lower.
Always going to be a compromise though. Chain will need adjusting as well.
 

Offline Metaljockey

  • Senior Member
  • ***
  • Bike: KTM 640 Adventure
    Location: Eastern Cape
  • Posts: 1,136
  • Thanked: 1 times
  • Dodgy S.O.B.
Re: DRZ 400 Sprocket ratios
« Reply #3 on: October 31, 2011, 10:02:23 am »
I recently took my wife's bike down to 15/38, which is about as low as you can go.

It now runs with my X-Challenge at a GPS 130km/h quite comfortably without stressing the motor.

 We also did some light technical stuff going over the Old Post Road in the Cederberg with two river crossings and the sandy route from Brand se Baai to Groen Rivier on the West Coast. She never complained about too little grunt.

If you are riding to Zambia I would suggest that 15/38 would be the easiest for the bike and consumption. My may want to put some money away for an arse transplant on your return though.

Offline Gary M

  • Newbie
  • Bike: Suzuki DR-Z 400
    Location: Kwazulu Natal
  • Posts: 7
Re: DRZ 400 Sprocket ratios
« Reply #4 on: October 31, 2011, 10:12:46 am »
 :D Have a modified seat but chuckling at my mate who's desperately trying to find a gel seat!
Thanks so much for all the info. Need to double check the number at the back as 49 seems high. Might look for at 38- 40 then
Thanks again guys for all the feedback!
 

Offline Heddles

  • Senior Member
  • ***
  • Bike: AJS (all models)
    Location: Western Cape
  • Posts: 2,391
  • Thanked: 25 times
Re: DRZ 400 Sprocket ratios
« Reply #5 on: November 01, 2011, 07:53:49 pm »
Please guys.... Tell me where I can get a 38 rear.. I have a 15/41 on mine and it's way happy right from word go.. Would like to get the revs even lower.. Haven't checked speeds but at a mates 130 in his car, it seemed way happy and it still hoists onto it's back wheel in 2nd. At a push, I can get it to stand up in third as well. (Not a habit of mine though)

Realistically, I don't think these bikes were designed to do long rides at 120 but they seem happy doing it.

Ha ha ha.. love the arse transplant bit..