DT125R FORUM

Happy new year to all,I wish you only good health, everything else can be gained more or less.

@Calum Thank you for the existence of the forum.

@SpookDog Turns out if you run 421 pitch chain on a bike putting out nearly 30+ ponies, it's really only good for a few ride outs.

Snapped 2 years ago, haven't ridden it since. Restoring it back to 520 pitch.

Was rapid though, probably did like 500 miles on a chain which was probably only designed to do a single race 😉

6Nm rings a bell 🤣 Haynes is invaluable.

@HOTSHOT-III Interesting bike that Aprilia,never seen one before.
A DT could transform into something similar,twin headlights, modified bigger tank, keep it's enduro costume.

@Calum I would grab a tig/mig and extensively repair the frame. But I am known to see hope/light in garbage stuff with a lot of time and work coming back to life.
Example. I was offered an XT500 with low km's but sea salt corrosion damage to the frame,not passing "MOT" here.Very low money,but I have no time....for now waits to the owner garage until I find time.

Useful bearing part numbers for the N1 Cagiva Mito/Raptor/Planet Bottom End:

Name Dimensions (mm) Part Number OEM Part Number Notes Left Hand Main 25x62x17 6305C3 800098349 Can obtain C4 for tighter clearances Right Hand Main 25x62x17 6305C3 800098349 Can obtain C4 for tighter clearances Left Hand Balancer Shaft 15x42x13 6302 800053248 Right Hand Balancer Shaft 15x42x13 6302 800053248 Left Hand Gearbox Output Shaft 20x52x15 6304 800024947 Right Hand Gearbox Output Shaft 14x22x13 NA-4900RS 800036440 Right Hand Gearbox Input Shaft 17x47x14 6303 800043382 Left Hand Gearbox Input Shaft 16x24x13 RNA-NA4901 800037198 Left Hand Water Pump Shaft 8x12x8 HK0808 800047678 Right Hand Water Pump Shaft 12x16x10 HK1210AA 800033718 Oil Pump Shaft 8x12x8 HK0808 800047678 Output Gear Pump Shaft 13x19x12 HK1312 800049016 Selector Drum Shaft 24x30x7.5 HK24X30X7.5-TN 800062200 This will need to be salvaged due to replacement parts not being easily accessible. Shares parts with KTM/Husqvarna but very expensive and not load bearing so not worth replacing IMO.

To completely overhaul the engines bearings you'll need a total of 13 bearings for the crank cases.

I have spent all day on this and I THINK it's correct. I've checked and cross referenced the part numbers and my existing cases and have tried to marry up the numbers to real-world buys. If there is a mistake please let me know and I'll update the table.

The links are not affiliated, they're just a reference to what's around.

@Hark_Ptooie I found with the Tecno expansion chamber (basically identical to the Athena) it fitted a lot easier using the genuine Yamaha rubber grommet and spacer on the upper mount. The ID of the spacer is quite large and allows a little more movement to line it up than the grommet/spacer supplied..

@Calum That site is known even more year's!!!!!