Most necessary part for Cbr250r. The radiator guard. Its job is to protect the radiator against stones that hit the radiator due to short front mud guard (bikes like r15 dont need it as the mud guard is longer ). Maintenance of our radiator is very esksential as it is delicate and a very crucial part of the bike. Ther r a lot of aftermarket radiator guards vailable but at a greater price, for eg the radguard that costs around 4 to 4.5k. The custom made one may not look expensive, but doesnt look bad either!

In this DIY i try my best to provide full details on making one with the help of local mechanic and gas welding found in tinkering shops. I can only guide with the procedure.Cannot upload pics from scratch as i have already got mine done with the help of my mechanic. No part in bike is to be changed so i say its perfectly safe .

Note: Main purpose is to stop the stones carried by front tyre damaging the radiator fins, it doesnt provide any protection from dirt. Eitherways do it at ur on risk. I am not responsible for any damages caused although its highly unlikely to happen. U must have a lot of patience as there is not much space while doing the job. Use innovative ideas of your own too and let me know improvements in my work too :-) will b happy to correct myself with additionl data.

Measurement is very approximate and you may have to accommodate few changes in making yours. rely in practical trial and error while actually making your guard.

Steps with materials required.(pics named according to serial number of each point )
1) we need low weight mesh which doesnt obstruct airflow, Thin Clamps that can be beng to shape weighing less and fold-able metal to act as a beading/border.
Cut the mesh according to the approximate measurement given in the block diagram pic. (measurement includes overall length including border so cut it a few mm smaller)

CAUTION: use of mesh that obstructs airflow(thin holes) to a greater extent may damage ur bike by accumuliting too much heat. The fins need to breathe free.

2) Metal border to harden the mesh and to give it a perfect desired shape. The mesh is cut to shape and border is of folding type ie mesh is sandwitched between the, metal from all four sides.

3)Sides of folded metal borders are GAS welded. arc welding will produce too much heat and hence is not suggested.

4) 'L' clamp for the top and for the bottom. Best to take measurement practically than theoriticall. First the bottom clamps must b welded with GASwelding, make sure there is a decent space between the radiator and the guard.(approx measurement in Block Diagram)

5) Fit the bottom clamp of guard to the radiators bottom(where the radiators bottom rests) which is hollow with rubber bush, use 10size nuts and bolts.

6) The top clamp is the tricky part, weld it to the guards top and make sure it has a longer hole (adjustable, pic 7) and fit it closer to d top making sure it doesnt touch the radiator. It is fitted to the same slot the radiator.

7) Adjust radiator guard n make sure it doesnt touch the forks while turning. In case it does touch the forks just stick a two way sticker to the point of contact. Adjustments if anu must be done with the top clamp of the radiator guard :-)

Regarding cleaning the radiator use only soft water, use of hard water may result in salt accumulation upon the fins resulting in cooling isses.. Use a tooth brush to clean it after spraying softwater. Regular cleaning will result is less effor during cleaning. If too much dirt is accumulated may b a lot of work. All the best. Suggestions r welcome. :-)