Need help buying a lightly used r15 v4 intensity white

Bike details R15 v4 intensity white March 2024 With quick shifter Odo:1700 kms appx Bike still under emi,owner can't afford emi so he's selling Final price 1.95L (ie) 35k discount off of onroad 2.30L appx

I inspected the bike in person.. everything checks out..it's bone stock and from the looks of it he hasn't even ridden in rain much..no rust superb condition

The only sketchy thing is that..he wants me to pay him 90% of cash beforehand saying that he'll give me the rc card and sign the form 30 and 29 but he'll use my cash to close loan then get the noc then register under my name

The only niggle for me is(as my uncle pointed out to me) what's stopping him from saying that it's his bike and I stole it from him after closing loan or refusing registration by not giving noc from bank

When asked about this he's saying that he's a honest guy(probably idk him personally)and will not do such things blah blah

I'll have to convince my parents to let me buy this from my savings and my uncle sponsoring the rest

After all this my mom is telling me to save up more and get a new one from showroom next year

Any legal way to protect me incase if I decide to go forward with this as this fits my budget currently?