a few questions

**Thu Jul 21, 2011 1:13 pm » Post: #1 » Download Post**

hi all, my nsr has no water in the radiator or bottle( hasnt been run like this). im just wondering on how to fill the rad back up? can i fill the rad to the top and then fill the bottle to its mark? also i need new front disks and new discs for the mc16 are pricey so would there be a cheaper option like vfr, cbr discs?

**Thu Jul 21, 2011 3:05 pm » Post: #2 » Download Post**

just fill them up as you have described mate
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ive seen more tarts than mr kipling

**Thu Jul 21, 2011 3:53 pm » Post: #3 » Download Post**

Lean your bike to the left at 45 degrees and this helps the air get out of the radiator so you can top it up

**Thu Jul 21, 2011 5:39 pm » Post: #4 » Download Post**

thanks guys, thought thats how you do it but safer to be sure.
thanks again Very Happy

**Thu Jul 21, 2011 11:20 pm » Post: #5 » Download Post**

fill it up, gently squeeze the hoses to purge some air bubbles, let it idle a few minutes with cap off, shut it off, and top off as needed. At least that's what i have done in the past.
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-Jim
'93 MC21

**Thu Jul 21, 2011 11:49 pm » Post: #6 » Download Post**

So you don't bleed them? On the KTMs we've got there is a bolt that you undo on both the head and radiator. You unscrew them to purge the air, screwing them back in when coolant comes out.
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MC21 Honda NSR250. TYGA 300 conversion.

**Fri Jul 22, 2011 11:54 am » Post: #7 » Download Post**

NSR's dont have bleeders on the cylinders like the Honda RS (or the KTM it sounds like).

Without the bleeders, I would fill up the radiator, squeeze the hoses, tilt the bike approx 45 degrees to each side, refill, repeat till the level in the radiator doesn't go down anymore.

I do this same process with my RS with the exception of bleeding water pump, cylinders and head using the bleeder/purge bolts.

**Fri Jul 22, 2011 2:31 pm » Post: #8 » Download Post**

MC21/28 cylinders do have bleeders. At least mine do.
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MC21R9N track
MC18R2J track
CBR954
CR250

**Fri Jul 22, 2011 2:51 pm » Post: #9 » Download Post**

you are correct... cylinders do have bleeders, heads dont.

**Fri Jul 22, 2011 5:25 pm » Post: #10 » Download Post**

Surely that renders them utterly useless? Gravity will do the front cylinder and head, it's the top head you're concerned about (if you're concerned at all, all I ever do is run it up with the rad cap off and fill it up.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread

**Fri Jul 22, 2011 6:44 pm » Post: #11 » Download Post**

it wasn't that long ago i was the one asking the stupid questions.
i couldn't pass up an opportunity to correct a master. trivial as it was. Smile

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MC21R9N track
MC18R2J track
CBR954
CR250

**Fri Jul 22, 2011 11:11 pm » Post: #12 » Download Post**

On the KTMs I have the bleeders are on the heads. Which makes the most sense as the air will naturally go to the highest point. Of course, the highest point on the NSR would likely be the cylinder.
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MC21 Honda NSR250. TYGA 300 conversion.

**Sat Jul 23, 2011 8:51 am » Post: #13 » Download Post**

I also lift the front wheel up as high as me (and someone else) can. But the side to side and squeezing hoses works a treat.

**Sat Jul 23, 2011 10:38 am » Post: #14 » Download Post**

Lifting it and shaking it? whats that all about, you cant do that with your car, do as fontyy says, run it up, fill it while running it, no problems.
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Proud Father of , 05 ktm 400exc supermoto 2018 honda crf rx supermoto

**Sun Jul 24, 2011 11:09 am » Post: #15 » Download Post**

thanx for the replies everyone. the job is done now Very Happy