Any preference between a NGK CR7HSA and NGK C7HSA spark plug

[brainpup]

While I normally run a NGK C7HSA in my Taotao EVO 150cc scooter and get good performance out of the plug (63mph with a little CVT mods and aftermarket pipe). But I was thinking about going with one of the CR7HSA plugs this next time when I do my scheduled (every 4 months) "Maintenance Routine"...which entails Changing engine oil, changing gear oil, cleaning air filter, cleaning the blades on my cooling fan, checking my belt for wear and doing a check of all my fuel and vacuum lines.
I know that the "R" in the NGK plugs designation stands for Resistor and its suppose to stop your engine from interfering with any radio, cellphone or engine computer functions...but I don't use any of those while riding (other than my CDI).

The main reason for my concern is that just recently I had to do an emergency fill up at a 7-11 and right away my scoot was a beeotch to get started (I used their 93 octane, while I normally fill up at a different gas station and use Non-ethanol 89 Octane).

But when I pulled the NGK Iridium CR7HIX Plug out it looked wet, so I put in a used NGK C7HSA and she started but was a struggle. Next day wouldn't start, pulled plug and it was wet too, put another C7HSA in and she started but once again it was a struggle. So I went to the Gas Station (with the Non-Ethanol) and got me a can full (left my scooter idling) and then I went back home and drained the rest of the 7-11 fuel out. After I put the fresh Non-Ethanol back in, she fired right up and runs good again.

NOTE: I have found over a 6 month test period that I get better performance out of the Non-Ethanol 89 Octane (not so much with the 87) over 92 or 93 Ethanol enriched fuel, my fuel mileage went up 6-7 miles per tank full (1.3 gal) average on 12 fill ups too.

Now seeing that I have gotten 3 good plugs fouled out by some garbage fuel, I am wanting to buy 2 new ones (never hurts to have a back up plug) and was looking for some input and viewpoints .


Should I just get the C7HSA or switch to the CR7HSA ? (they are the same price) or dig deep into my wallet and buy another Iridium plug...(1 = 3 of the others in cost)

this Pic is of my Iridium plug after the garbage fuel...its been in for about 8 months and the last 2 times I checked it, it looked like it was still brand new with no blackening anywhere...I guess I can wire brush it 

[jloi]

hey , brainpup ; what year is your EVO? MINE IS 2014 . I'm running iriduim too. . I have 3 old CR7HSA's and the iridium is CR7HIX .I've been putting in only Sunoco 93 . but don't really know about "gas". I'll look next time and see if it's E or non E. I do know my plugs get black.
I have a new Hoca drive face for the variator and a new belt I'll be putting on pretty soon and I'll be looking at plug color etc. then too.

[brainpup]

My EVO is dated 09/2013 I got her 04/2014 with 1000km on her, she'd been in storage for 4 months and still looked brand new. (a landlord got her as payment from a tenant for storing his stuff while he sat in jail for a DUI) so I bought her for $600, still had the blue plastic over the ignition switch, the seat lock and the clear plastic was still over the tail light !! I literally got a barely broke in scooter for half price, with no damage or wear...
I've put another 12,000km on her, so the odometer reads 13,400km right now...but in February I had to put a new motor in her because I let some moron try and tune my new carb/pipe setup and he ran it too lean and fried the cylinder...I do my own work now.
The Sunoco's around here do not sell Non-Ethanol...Kangaroo Express, Quik Trip and a close by "Kornor Store" (thats how they spell it..lol and I'm not sure who they actually get their gas from but its 89 Non-Ethanol and my scooter runs great with it, even better than Sunoco, EXXON, or Shell 93 octane...and my plugs stay clean.
How do the CR7HSA work ? same as a regular one ? difference from the Iridium ?

Mods wise : 26mm Mikuni Carb, aftermarket pipe that breaths big time, Orange CDI, Orange Coil, 12 gram weights in my Variator, 1500RPM Clutch Springs, 2000RPM Torque Spring and a 842x20x30 Gates Powerlink Kevlar Belt. plus a set of LED Headlights and Blue Ice White Dash Lights.
My next thing to do is repaint her, clear coat is peeling off even though I put a cover over her every night

[jloi]

I just started with iridium recently; didn't notice any diff in way it runs and haven't had the plug out yet to look at it. Ill have to go to Kangaroo.
I bought mine in late 2015 for $800. I figure it was way too much. too much wear and tear - I think. first scoot , didn't know anything . still first scoot but know a little more now since I been coming here.
I put a new motor in mine too last Jan. I had the idea I needed to get a new carb; don't remember why . I think I thought it was just time , couple years old now blah, blah. So , didn't really know parts then ; since then bought bunch of new stuff and done quite a bit of just working on it. compared to last 35 -40 years not doing any mechanic stuff since mid 80's . anyway bought a cheap carb and best I can tell it came from factory with the end of the idle mix screw broken off. only found out after trying for 2-3 mos to get it to run right . never thought to look at idle mix screw until after driving it a lot with poor idle, poor pick up , just all around running ragged. had no idea. my best guess is it was running rich and ruined the rings , ended up with 0 compression with HF tester. tossed motor . ordered a new one. since then , been into the new motor. If I knew then what I do now I never would have got a new one - just new parts for that motor.
I got sick and tired of broken plastic and always having to take it off to do anything so I'm in the process of going naked with it.

[brainpup]

Wow, thats sounds like a lot of hassle, my scoot was bullet proof for the 1st 4 years and 12,000km. Then I let that "moron" work on it and needed a new motor, shes been good to go ever since (well except for that garbage gas I bought last week) I've found that when it comes to important parts like a Carb or belts its best to buy quality parts.
Our scoots run best with a 26mm carb (buy a good one) and a 842 belt. oh and keep your airbox on, mine didn't like the other cone-like filters at all.
is your scoot a blue one ? mines red
How did you get broken plastic ?
BTW if you take your seat off you can pretty much get to everything on the engine. I actually done have any of the bolts or nuts holding mine on except the hinge one in the front and thats only 2 10mm bolts/nuts.

BTW my name is Brian and I'm in Charlotte, NC but I'm originally from Cocoa Beach (long time surfer) and have lived in O'ville as recently as 2001.

[jloi]

my airbox was already gone. I find it's best to buy quality parts too; now. yeah, my front fender is blue ;only plastic left on it . the pic in my avatar is it but it's so blurry you can't really see it and it's too far away.
every time I took plastic off to do something I'd find another tab broken off ; same with the black access cover that comes up from the floorboard ; think there might be 2 tabs left or 1.
1st thing I ever did was brakes; and front wheel cylinder.
look here -http://49ccscoot.proboards.com/thread/24876/conversion-150cc-digital-led-boot?page=1

and here- 49ccscoot.proboards.com/thread/26040/help-tiny-female-spade-connectors

I looked but don't think I have any more pix with all the plastic - any more

Jeff here. I lived in Gville for last 10 years and came back to Oville in Jan of last year. My mom is 95 now and needs someone here .

graduated Winter Park High in 72 . mostly stayed here except Colo. Springs in 80-82 . never surfed. in 65 in Miami my dad built a board for us- a 10'6" monster and he glued a rubber pad to it- to "help us learn"

 I haven't had my seat bolted down now for over a year .

 my carb is a PDJ 24-           pretty sure .  I should remember . I bought enough of them . maybe it's PD24J .  I'll have to check on the size/mm . thought it was 24mm . I've always had a Uni air filter.  and I'll check and see what belt I bought and we can compare.

I'm really interested in what you might have done if anything , other than stock. BTW I only ever got 52 mph and that was with the cluster stock speedo.  I did GET 53 just a while back with my phone GPS.

 maybe I need a 26mm carb.

 anyway , hope I can get this thing back together.

[jloi]

here's what I bought recently . gettin ready to install soon . working on rewire too/1st?




www.partsforscooters.com/

this is the carb I have -

www.partsforscooters.com/164-49-Universal-Parts-GY6-125cc-150cc-Carburetor

I think this must be yours-

www.partsforscooters.com/164-323-26mm-GY6-Carburetor

I wonder what would happen if I put a 30 or 32mm OKO carb on . wonder what kind of tuning I would have to do? maybe change the clutch and variator around . do all kinds of pain in the ass tuning ? experimenting . lots of dollars. might not even be something good for the scoot to do . " Wrong " , you know ? maybe even different exhaust.
your exhaust looks different . shinier. mine's just basic stock muffler. I guess yours is too , just different cover? I had a problem with mine awhile back had to replace header and muffler ;it was an operator created error . then when muffler got here , had to basically rethread one of the holes for muff to pipe connection which didn't line up . Chinese.

I guess you have one of these belts -

www.partsforscooters.com/Belt_842-20-30_gates_2

www.partsforscooters.com/106-126-Bando-Belt_2

mine must be a different length . I'm following advice from one of the parts guys at PFS when I buy parts. he matched the belt with the variator face and stock clutch.

here's some pix of what mine is now -







one of the guys here on the forum sent me those big lights along with 2 others -diff. style - which I couldn't get working - for free , even paid shipping and him and another guy here  gave me their  phone # and we've talked some .

this is why I have the large basket -

49ccscoot.proboards.com/thread/25330/loaded-work?page=1

I need to go to the local electronic/surplus store where they have all kinds of diff stuff and get some more alum. flat plate and alum angle for my headlight fabrication .

[collinsd84]

Dec 1, 2019 13:30:39 GMT -5 brainpup said:

While I normally run a NGK C7HSA in my Taotao EVO 150cc scooter and get good performance out of the plug (63mph with a little CVT mods and aftermarket pipe). But I was thinking about going with one of the CR7HSA plugs this next time when I do my scheduled (every 4 months) "Maintenance Routine"...which entails Changing engine oil, changing gear oil, cleaning air filter, cleaning the blades on my cooling fan, checking my belt for wear and doing a check of all my fuel and vacuum lines.
I know that the "R" in the NGK plugs designation stands for Resistor and its suppose to stop your engine from interfering with any radio, cellphone or engine computer functions...but I don't use any of those while riding (other than my CDI).

The main reason for my concern is that just recently I had to do an emergency fill up at a 7-11 and right away my scoot was a beeotch to get started (I used their 93 octane, while I normally fill up at a different gas station and use Non-ethanol 89 Octane).

But when I pulled the NGK Iridium CR7HIX Plug out it looked wet, so I put in a used NGK C7HSA and she started but was a struggle. Next day wouldn't start, pulled plug and it was wet too, put another C7HSA in and she started but once again it was a struggle. So I went to the Gas Station (with the Non-Ethanol) and got me a can full (left my scooter idling) and then I went back home and drained the rest of the 7-11 fuel out. After I put the fresh Non-Ethanol back in, she fired right up and runs good again.

NOTE: I have found over a 6 month test period that I get better performance out of the Non-Ethanol 89 Octane (not so much with the 87) over 92 or 93 Ethanol enriched fuel, my fuel mileage went up 6-7 miles per tank full (1.3 gal) average on 12 fill ups too.


Now seeing that I have gotten 3 good plugs fouled out by some garbage fuel, I am wanting to buy 2 new ones (never hurts to have a back up plug) and was looking for some input and viewpoints .


Should I just get the C7HSA or switch to the CR7HSA ? (they are the same price) or dig deep into my wallet and buy another Iridium plug...(1 = 3 of the others in cost)

this Pic is of my Iridium plug after the garbage fuel...its been in for about 8 months and the last 2 times I checked it, it looked like it was still brand new with no blackening anywhere...I guess I can wire brush it 

Rainy day and thought I'd do some checking:
Looks like the OEM plug was a Torch A7RTC = NGK CR7HS. My preference is the NGK brand.
They both appear to have a resistor so I would leave that alone. Don't know what the A means, but dont see that as a problem. How many miles r u getting out of a plug?

progreengrass.com/spark-plug-cross-reference-chart/

I think the fuel might have been the factor, since u just filled up.
A friend of mine who worked for Texaco said different additives are used to determine octain of the gas.
No telling where 7-11 got their gas or when the tanks were filled. My suspected water in the gas resulting n the wet plug.

We just switched from "Summer" gas to "Winter" gas, meaning more volital additive r used. Alcahol is also volital, and determine octain.

Have u switched brands of motor oil? Just some thoughts.

I hale from Winston-Salem. Hello! neighbor.

[jloi]

Oh, maan . I have no idea about plugs.sorry. I've had the wire harness of for weeks now , so not driving . I keep making mistakes with diff purchases for crimps etc. and it costs me more time again and again waiting for other right or wrong parts. I finally got the right size but it's a slow process for me to do the wiring. flying while blind . also eye appt. today ; rode 4 miles on my bike to the VA and then a shuttle to another VA across town. anyway, one little roadblock after another. but I'll get it eventually. then comes the new CVT parts and belt and I may need new clutch parts; I suspect. good luck. stay in touch.

[FrankenMech]

Check this out:
www.ngk-sparkplugs.jp/english/techinfo/qa/q08/index.html

Ethanol in fuel can harm many parts in the fuel system which can change mixtures etc. Most of our scoot engines are designed to run on non-ethanol fuel.

I HATE plastics on scoots. Ride NAKED!