ah yes....now i remember thx Joe.

It sounds like there is no consensus on this, but I had a customer today ask if we could get a piston/sleeve replacement for the GRP .21-S engine that Losi at one point was selling. It looks like they have discontinued distribution of the GRP line as others have stated; do we know if there is any direct-fit replacement that can be used with this engine, or are people who have this engine out of luck?

Thanks man.
I'll check and see.

future ..there doesnt seem to be a direct replacement ...the only thing that will work is mr-ninja parts ...unfortunately they have all been bought up ...horizon scooped up all the parts that were left ...but unfortunately they are mostly parts people wont need ....you can find cases , o-rings, carb parts , and crank shafts still for sale here and there ...the really impportant stuff such as p/s and rods are long gone ...if any one needs a p/s for a tuned grp .21 that will also fit in a standard grp ...check the for sale thread i have one up there for sale n.i.p ....im not going to run them any more as parts arent available ...so i figured someon on rc tech might need it ....i wouldnt be surprised if a year or 2 down the road they pop up again ....its hard to keep those pesky italian down ...man they made a good motor ..sucks they are no more ..hope that helped

You would think a company would take over GRP's engine line and start making them, and parts. How hard would it be for O.S. , Novarossi, or Go Tech() To pull something like this off?

Hey guys i bought another GRP Sport and decided its a little late in the season to be buying engines so if anyone wants it pm im only asking $200 shipped

How about a couple 100,000$ in molds.

Those GRP parts that Horizon got were about 2 months ago and long gone for the p/s.....

Checked today at my lhs, those engines are the magnesium heads..They say MR21 BO1T...Maybe the "t" stands for titanium? they are $425...They have about 10.....Would be nice to have one........

was pecking around on ebay and found this maybe someone needs it

http://cgi.ebay.com/GRP-Tuned-Connec...d=p3286.c0.m14

ok guys i got a huge problem. i went to the track today with hope of running my truggy. But the problem is the idle screw wont keep the idle set when my throttle servo goes to brake it shuts the carb on the grp .21 sport and i adjusted the idle screw for about an hour and nothing is working. mabye some of the idle screw broke off in the carb. thanks!

can some one post a pic of what there idle screw looks like?? and does anyone know where i can get a replacement idle screw???

http://www.amainhobbies.com/product_...r-Idle-Screw-1

My LHS obviously isn't able to restock the GRP plugs so I wanted to know what would be a good plug I could use as a replacement? I heard something about the OD 77T or OD 97T would work well with the GRPs. Anyone know if this is true or not? I have a bunch of them that I have for my plus4. Just wanted to play it safe and make sure. Thanks guys!

is your throttle linkage set right ....thats a common problem when hitting the brakes ...the linkage not set right causes that

97t all ive ever run in mine ..never had any issue ...as long as you havent run a p-3

Nope, only ran GRP plugs. Thanks! I'll give it a shot after my last grp dies hopefully it will last me for these next 4 races. :X

how many gallons? all mine have run at least 5-6 gallons before need ing attention ..besides bearings which i replace with tkos ..then when it does start to flame or give problems just send it somewhere like alan burtons speedshop and get it pinched and as long as the rod and crank are good (usually are) your good for another 2-3 gallons ...