Brother build.. 1986125xc/74 450cr

Found one that looks like an exact replacement.. by bore size anyways.. same diameter, and length.. can any of you tell me the spark plug size I would need for this bike..

ngk 8 or 9 would probably do it. std was a bosch w3c

as he said! b8es ngk

I think champion n2c will work as well.... If my memory serves me right anyways... But there is chance I'm incorrect.

yeah but then you have a champion plug in your bike

I got nothing against champions. My dad used to only run champion in all the old huskies and never had any issue. I had in my bikes when I was younger and never had a problem. It's all about what you prefer I guess. As long as it sparks I'll run it but b8es are the most readily available by far and every bike I have besides the 15 te300 and my 77 xr75 use them.

I would prefer Bosch or NGK over Champion but I'll run a Champion without too much thought. Like 87husky500xc said, as long as it sparks...

as long as your jetting is well sorted, a spark plug should last till it becomes visible worn out. I have the same plug in my 400 that I replaced when I restoed it in 2011. I once (1unce only) replaced a plug with a new one before a big event (years ago) and the bloody thing was a dud. had to throw the old one back in on the start line. never again if it works and its not too rounded on the electrode its good to go.

champions quality has slowly dropped over the years. i just dont care for them compared to other brands as im never in dire need of plugs.

measure the wrist pin to top of piston
that is critical

I wouldn't buy a modern Champion but I bought a job lot of NOS several years ago and they last for ages especially with modern ignitions!

As far as to differences between the 450 and 460, engine wise none. Displacement is identical at 452cc

Yea the namura piston didn't work, bore size was right, but the wrist pin was wrong.. found a used one for a decent price.. can anyone show pictures of how the radiator hoses connect, mainly exhaust side but a picture of both would be appreciated..

get on to the HVA site, they have manuals to download. parts list should show hoses.

I've had bad champions out of the box...never with ngk

I purchased a complete '85 125cr and two parts bike a '85/'86 125cr's. Between the three bikes I made the '85 cr run again. I mic'd the used pistons and cylinders and put the ones together that measured the closest. Frankenstein 125cr ran great. I wonder if eBay has the parts.