I've seen this question quite a few times here and there, just thought ill do a short step by step write up to help those who need to DIY cause runner fee's are RIDICULOUS.

1. Buyer and seller to discuss who will pay for inspection and change of ownership fees.
-Inspection Rm30
-Change Name - Rm150

2.Seller to bring the vehicle to puspakom for inspection with geran/registration card. Request for a form at the counter. Complete inspection and collect the slip/result.
B5 - if new owner buys with cash
B5/B7 - if new owner is using hire purchase/car loan, once done provide approval slip to bank and bank will do name transfer on their side, you pay the bank rm300-400 depends on the banks...they call this transfer fee if I'm not mistaken.

-please remove your tint if it's too dark yourself by going over to an accesory shop, they can charge between rm30-60 depends on car/place etc.. if not puspakom guys will just tear it off and leave the gum all there or just fail you.
-some are even open on saturdays for those who are busy working during weekdays. can check out their site
Puspakom Branches and Opening Hours

Update:
3.Proceed to JPJ for change of name request with geran and all the documents above., request change of ownership(tukar nama) document at front desk. Fill form of new and old owners details. Obtain que number from front desk and proceed to counter for IC and thumbrpint verification for both new and old vehicle owner.

4.If one party is out of state, they can go to their respective JPJ branch and complete the procedure seperately.
For those who cant go to jpj directly:

Runner fees for inspection can range from rm80-rm150, and change name rm300. for those who dont have time, can use this services. For those who needs special request due to punched engine number, mounting modification, no approvla for sunroof etc or aka special case, you have no choice but to bare the fee's of a runner which is going to cost definitely more than Rm150 for special case. I even heard of Rm1k for this kind of situations.

Prepare your geran, photocopy of IC buyer and seller and hand over to runner. He will also need the original signed copy of the forms mentioned above.

ADDED:

For those who want, can aslo call puspakom 03-20527474 and schedule an appointment 3 days in advance to come over to your house and perform the inspection Rm100 service fee+rm30. However only certain branches can offer this services, so check at the link above or contact them.
ADDED - Hire Purchase

you can change name, just cant get roadtax if insurance isnt active. as jpj  procedure requires owner to cancel existing roadtax

that would be best practice.

Old owner usually doesn't need to worry since transfer of ownership was completed, any new offences is under the new owner. New owner can also buy insurance and roadtax after change of ownership is done. As in right after. Depends on new owner.

Some do it before and straight apply for roadtax, some do it after change of ownership, they contact their agent or go outside and choose an insurance provider, then later go back in and get their roadtax