Tyre pressures? - Kawasaki KLR 650 Forum
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post #1 of 10 Old 08-22-2007, 07:03 PM Thread Starter
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Tyre pressures?

Hi all.

I've got an '04 KLR 650. I'm running Dunlop Trailmax front & rear. In 30,000 miles, these tyres have never let me down on the road. I'd like to keep running them if they don't try to spit me off in the dirt.

I bought this bike because I thought it was relaxing & predictable, but on the dirt I have to ride it hard & fast to keep the front end still. If I wanted to ride like that, I would have bought more of a dirt bike, not a KLR 650.

How low could I drop the tyre pressures without damaging the rims, & how much better would the front end feel when I'm just having a lazy, easy ride on the dirt?

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post #2 of 10 Old 08-24-2007, 12:28 AM
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My experiences with a few different tires is that some have heavier duty carcasses than others. For the average wall tire, when I am riding mostly dirt with very little pavement, I lower the front down to around 11 lbs. and the rear around 12 lbs. So far I have not needed a rim lock and I don't believe I have hit the rim hard on landings or hard hits. Excellent grip this low.

If I know I will hitting about 50/50 street and dirt, I go to around 15/17. This allows the tires to get a much better bite, on dirt, than the factory 21/28, but also doesn't seem to bother the tires too much on the street.

Of course, it's not for everyone. Just where I like to keep them.

Keep Loving Rides!
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post #3 of 10 Old 08-24-2007, 06:12 AM
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When I'm off road, I run around 18 f/r, and I haven't tried running any lower, but I'm sure I could get away with it.

When I'm on the street, I run street pressures in my tires. 33f/35r or somewhere in that neighborhood. This gives me better tire life by running cooler, and since I'm running Michelin Anakees, they're rated for pressures higher than this.

The factory "setting" is just a compromise between street and dirt pressures, and in reality, sucks for both conditions.

I run street pressures all the time, and when I get to something that I need lower pressure, I air the tires down. When I'm done dirt riding, I just top them back up at the next filling station.
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post #4 of 10 Old 08-24-2007, 11:16 PM
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Good God! I hope your not on the same set of tires for 30,000 miles now! LOL

Not sure what a Dunlop Trailmax looks like, but without some good knobies the KLR can be a beast off road. My experience was Avon Gripsters. Good on road but the only way to use them off road was to lay astro turf down the trail! I've had good luck with a Kenda Track master rear and stock front for most off road riding. keep in mind I ride 75 miles minimum to get off road. Then it's single track with mud, dry creek beds, hill climbs and stream crossing. I run the above at about 16 front 14 rear. Be warned however, getting to low on air preasure can allow the tire to spin on the rim if you get too agressive. I'd say anything under 12 in agressive riding and you should check out some rim locks. Have fun!

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post #5 of 10 Old 08-24-2007, 11:41 PM
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Pretty much what was already said, don't go below 12 unless you absolutely have to. With rim locks it doesn matter though. You will notice a huge differance when running lower pressure off road.
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post #6 of 10 Old 08-26-2007, 10:47 PM Thread Starter
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Thanks guys.

I'll drop it down to 15 front & rear & give that a go.

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post #7 of 10 Old 09-14-2007, 07:49 AM
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running low tire pressures

The only trouble I've had running low tire pressures is with the front. I've pulled inner tube valve out on three tubes Last time I changed a front tube for this reason, I put extra baby powder on the tube and so far, so good.

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post #8 of 10 Old 09-15-2007, 11:05 PM
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Well I need to explain myself better. I never go below 15 in the front, unless its really slick and I have ds tires on. Its the rear that needs less pressure, for more bite. The front does pretty well at 15.
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post #9 of 10 Old 09-16-2007, 05:36 PM Thread Starter
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I did 120 miles over dirt trails, sand,mud & rock. Both front & rear were down to 15psi from 21psi. Worked a treat. Me, my young bloke, camping gear & food on the bike, I was able to relax & just ride the thing without the front skating around all over the place like it usually does. I only had to catch the front once over the whole weekend.

Thanks heaps guys.
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post #10 of 10 Old 10-20-2008, 05:23 AM
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I pretty much agree with what everybody has said. I have settled on 15-18 psi for everything I do. OK on street and dirt. Had 1 ride with 23 up front (hilly,rocky trails) and I never want to do that again
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